Degradation Of Fracture Toughness In Steels Due To Prior Strain

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Degradation of Fracture Toughness in Steels Due to Prior Strain: A Predictive Model

Author : Gregory Benson Sanford
Publisher :
ISBN 13 :
Total Pages : 83 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Degradation of Fracture Toughness in Steels Due to Prior Strain: A Predictive Model by : Gregory Benson Sanford

Download or read book Degradation of Fracture Toughness in Steels Due to Prior Strain: A Predictive Model written by Gregory Benson Sanford and published by . This book was released on 1983 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis quantifies the relationship between prior plastic strain, fracture toughness (J sub Ic), plane strain fracture strain (epsilon sub fps), and yield strength (Q sub y) of HY-series steels at room temperature. Based upon initial J-integral test results of compact tensile specimens that showed a reduction in the fracture toughness with increasing of prestrain, a correlation has been developed where JIc is directly proportional to epsilon sub fps to the fourth power. Thus, small changes in epsilon sub fps will cause large changes in JIc. Further, it has been found that prestrain reduces epsilon sub fps by an amount equal to the prestrain. The combination of these two correlations provides a very simple method of estimating the fracture toughness subsequent to plastic straining. Scanning electron microscopy was used to measure the crack tip stretch zone width (SZW), which is a good estimate of the crack tip strain prior to fracture. The SZW does decrease with increasing prior plastic strain verifying the decrease in epsilon sub fps.

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 538 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Influence of Pre-strain on Fracture Toughness and Stable Crack Growth in Low Carbon Steels

Author : S. Aihara
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Influence of Pre-strain on Fracture Toughness and Stable Crack Growth in Low Carbon Steels by : S. Aihara

Download or read book Influence of Pre-strain on Fracture Toughness and Stable Crack Growth in Low Carbon Steels written by S. Aihara and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental investigations demonstrate a significant effect of pre-strain on fracture toughness and stable crack growth resistance of a low carbon structural steel. Fracture toughness, Ji for the onset of stable ductile crack growth is decreased to one half with a 9% pre-strain due to cold rolling. The characteristic distance model for ductile crack initiation was applied to analyze parameters affecting the degradation of fracture resistance. The model predicts that value of Ji is given as a linear function of yield strength and ductility of the material. In order to confirm the theoretical prediction, notched round bar tensile tests were performed and ductility under a high triaxial stress state was measured. Critical plastic strain for micro-void coalescence is significantly decreased with increasing pre-strain. Degradation in Ji due to pre-strain can be well explained by the characteristic distance model.

Masters Theses in the Pure and Applied Sciences

Author : Wade H. Shafer
Publisher : Springer Science & Business Media
ISBN 13 : 1468451979
Total Pages : 407 pages
Book Rating : 4.4/5 (684 download)

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Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 29 (thesis year 1984) a total of 12,637 theses titles from 23 Canadian and 202 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 29 reports theses submitted in 1984, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.

Elastic-plastic Fracture Test Methods

Author : James Albert Joyce
Publisher : ASTM International
ISBN 13 : 0803114184
Total Pages : 351 pages
Book Rating : 4.8/5 (31 download)

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Book Synopsis Elastic-plastic Fracture Test Methods by : James Albert Joyce

Download or read book Elastic-plastic Fracture Test Methods written by James Albert Joyce and published by ASTM International. This book was released on 1991 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Nonlinear Fracture Mechanics

Author : John D. Landes
Publisher : ASTM International
ISBN 13 : 9780803112582
Total Pages : 652 pages
Book Rating : 4.1/5 (125 download)

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Book Synopsis Nonlinear Fracture Mechanics by : John D. Landes

Download or read book Nonlinear Fracture Mechanics written by John D. Landes and published by ASTM International. This book was released on 1988 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effect of Loading Rate and Thermal Aging on the Fracture Toughness of Stainless-Steel Alloys

Author : WJ. Mills
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Effect of Loading Rate and Thermal Aging on the Fracture Toughness of Stainless-Steel Alloys by : WJ. Mills

Download or read book Effect of Loading Rate and Thermal Aging on the Fracture Toughness of Stainless-Steel Alloys written by WJ. Mills and published by . This book was released on 1989 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of loading rate on the fracture toughness of Types 304 and 316 stainless-steel plate and Type 308 weld before and after thermal aging was characterized using both fracture mechanics and Charpy specimens. Aging at 566°C for 10 000 h reduced static Jc initiation toughness values for both wrought and weld metals by 10 to 20%, and tearing moduli were reduced by 20 to 30%. Under semi-dynamic and dynamic loading conditions, the fracture resistance was not decreased below the static response for either unaged or aged materials. The present results also demonstrated that the large degradation in Charpy V-notch impact energy after aging was not representative of the impact resistance for stainless-steel components containing cracks or crack-life defects. Fractographic examinations revealed that the large loss in Charpy energy was associated with aging-induced microstructural changes that substantially decreased the energy required to initiate a crack from a blunt notch. At very slow strain rates, creep crack growth was found to cause a significant degradation in fracture toughness.

Fracture Toughness Degradation in HY-80 and HY-100 After Prestraining

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Fracture Toughness Degradation in HY-80 and HY-100 After Prestraining by :

Download or read book Fracture Toughness Degradation in HY-80 and HY-100 After Prestraining written by and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is the first in a series that is attempting to discover the mechanism by which the fracture toughness J sub 1C, of HY-series steel decreases with increasing prestrain at room temperature. This decrease J sub 1C is a function of yield strength and plane strain fracture strain. However, this reduction in J sub 1C is shown to be caused by a reduction in the plane strain fracture strain. Fractographic examinations have verified this reduction in the fracture strain and also have shown that regions of very low ductility exist due to alloy segregation that is present in bands. The mechanism for the degradation in the toughness is believed to be such that stress relieving following prestraining would restore the toughness. (Author).

Fracture Toughness Degradation in HY-80 and HY-100 After Prestraining

Author : James Neal Mullican
Publisher :
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Fracture Toughness Degradation in HY-80 and HY-100 After Prestraining by : James Neal Mullican

Download or read book Fracture Toughness Degradation in HY-80 and HY-100 After Prestraining written by James Neal Mullican and published by . This book was released on 1983 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is the first in a series that is attempting to discover the mechanism by which the fracture toughness J sub 1C, of HY-series steel decreases with increasing prestrain at room temperature. This decrease J sub 1C is a function of yield strength and plane strain fracture strain. However, this reduction in J sub 1C is shown to be caused by a reduction in the plane strain fracture strain. Fractographic examinations have verified this reduction in the fracture strain and also have shown that regions of very low ductility exist due to alloy segregation that is present in bands. The mechanism for the degradation in the toughness is believed to be such that stress relieving following prestraining would restore the toughness. (Author).

The Effect of Strain Aging on the Fracture Toughness of Steel

Author :
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (2 download)

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Book Synopsis The Effect of Strain Aging on the Fracture Toughness of Steel by :

Download or read book The Effect of Strain Aging on the Fracture Toughness of Steel written by and published by . This book was released on 1968 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Steel Corrosion and Degradation of its Mechanical Properties

Author : Chun-Qing Li
Publisher : CRC Press
ISBN 13 : 1000437094
Total Pages : 268 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Steel Corrosion and Degradation of its Mechanical Properties by : Chun-Qing Li

Download or read book Steel Corrosion and Degradation of its Mechanical Properties written by Chun-Qing Li and published by CRC Press. This book was released on 2021-09-19 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art-knowledge on corrosion of steel, cast iron and ductile iron with a focus on corrosion-induced degradation of their mechanical properties. The information presented in the book is largely derived from the most current research on the effect of corrosion on degradation of mechanical properties. The book covers the basics of steel corrosion, including that of cast iron and ductile iron, that are not well covered in most literature. Models for corrosion-induced degradation of mechanical properties are presented in the book with a view to wider applications. The knowledge presented in the book can be used to prevent corrosion-induced failures of corrosion-affected structures, offering enormous benefits to the industry, business, society and community. Key strengths of the book are that it can be employed by a variety of users for different purposes in designing and assessing corrosion-affected structures, and that the knowledge and techniques presented in the book can be easily applied by users in dealing with corrosion-affected structures, and the uniqueness in examining the corrosion effect on degradation of various mechanical properties. Wtih examples of practical applications, the book is particularly useful for all stakeholders involved in steel manufacturing and construction, including engineering students, academicians, researchers, practitioners and asset managers.

Fatigue of Metallic Materials

Author : M. Klesnil
Publisher : Elsevier
ISBN 13 : 9780444987235
Total Pages : 274 pages
Book Rating : 4.9/5 (872 download)

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Book Synopsis Fatigue of Metallic Materials by : M. Klesnil

Download or read book Fatigue of Metallic Materials written by M. Klesnil and published by Elsevier. This book was released on 1992-04-13 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews problems in the mechanical behaviour of cyclically loaded metallic materials, primarily with regard to the nature of the fatigue process. The first edition of the book appeared in 1980. The present second edition represents a revised form of the original book and also covers recent developments in the field. As the book focuses on physical-metallurgical aspects, it occupies a unique and important position in the technical literature, which has so far been devoted mainly to engineering metal fatigue problems and their technical solution in specific practical cases. The book provides a compact review of current knowledge on physical metallurgical processes that accompany and affect the fatigue of metallic materials, and also presents the background for applying the new results to practical designing and to the selection of materials in engineering practice. The authors present an updated review of results from countries both in the east and the west and cover a relatively large field in a concise manner. The work will be of value to research workers and students following advanced and post-graduate courses in the fields of materials science and mechanical engineering.

The Effect of Strain Aging on the Fracture Toughness of Steel

Author : Yun Chung
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (632 download)

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Book Synopsis The Effect of Strain Aging on the Fracture Toughness of Steel by : Yun Chung

Download or read book The Effect of Strain Aging on the Fracture Toughness of Steel written by Yun Chung and published by . This book was released on 1968 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fatigue and Fracture Mechanics

Author : John H. Underwood
Publisher : ASTM International
ISBN 13 : 0803124104
Total Pages : 697 pages
Book Rating : 4.8/5 (31 download)

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Book Synopsis Fatigue and Fracture Mechanics by : John H. Underwood

Download or read book Fatigue and Fracture Mechanics written by John H. Underwood and published by ASTM International. This book was released on 1997 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fundamental Aspects of Structural Alloy Design

Author : Robert Jaffee
Publisher : Springer Science & Business Media
ISBN 13 : 1468424211
Total Pages : 665 pages
Book Rating : 4.4/5 (684 download)

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Book Synopsis Fundamental Aspects of Structural Alloy Design by : Robert Jaffee

Download or read book Fundamental Aspects of Structural Alloy Design written by Robert Jaffee and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: FUNDAMENTAL ASPECTS OF STRUCTURAL ALLOY DESIGN is the proceedings of the tenth Battelle Colloquium in the Materials Sciences, held in Seattle, Washington, and Harrison Hot Springs, B.C., September 15-19, 1975. The theme of the conference was the emerging science of alloy design. Although the relationships of properties of alloys to their composition and structure have long been a dominant theme in physical metallurgy, it is only recently that metallurgists have turned their attention from the analytical, post hoc study of the structure-property relationship to the synthesis approach of alloy design. As usual in the Battelle colloquia, the first day started with a group of introductory lectures presented by leaders in the field, each emphasizing his personal approach to the problem. This provided a historical perspective for the colloquium. These papers, together with the banquet address of Professor J. R. Low, Jr., who was honored at the colloquium, comprise the introductory section of these proceedings. Alloy design is generally specific to a given application. Thus, the needs in alloy design in a number of important applications, gas turbines, electrical-power-generation equipment, airframes, pressure vessels, and nuclear applications were presented in a group of papers. An agenda discus sion on "Needs in Alloy Design" followed. These papers give the external constraints on alloy design applications, and criteria for mechanical, physical, and chemical properties for which the alloys must be designed.

Effect of Prior Deformation on the Fracture Toughness in Metals

Author : Kodjo Francois Amouzouvi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Effect of Prior Deformation on the Fracture Toughness in Metals by : Kodjo Francois Amouzouvi

Download or read book Effect of Prior Deformation on the Fracture Toughness in Metals written by Kodjo Francois Amouzouvi and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mechanics of Solid Materials

Author : Jean Lemaitre
Publisher : Cambridge University Press
ISBN 13 : 9780521477581
Total Pages : 588 pages
Book Rating : 4.4/5 (775 download)

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Book Synopsis Mechanics of Solid Materials by : Jean Lemaitre

Download or read book Mechanics of Solid Materials written by Jean Lemaitre and published by Cambridge University Press. This book was released on 1994-08-25 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translation of hugely successful book aimed at advanced undergraduates, graduate students and researchers.