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An Evaluation Of The Varestraint Test For Studying Weld Solidification Cracking In Aluminum Alloys
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Book Synopsis An Evaluation of the Varestraint Test for Studying Weld Solidification Cracking in Aluminum Alloys by : Jiping Qu
Download or read book An Evaluation of the Varestraint Test for Studying Weld Solidification Cracking in Aluminum Alloys written by Jiping Qu and published by . This book was released on 1989 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hot Cracking Phenomena in Welds II by : Thomas Böllinghaus
Download or read book Hot Cracking Phenomena in Welds II written by Thomas Böllinghaus and published by Springer Science & Business Media. This book was released on 2008-08-07 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Failure of welded components can occur during service as well as during fabrication. Most common, analyses of the resistance of welded components against failure are targeted at crack avoidance. Such evaluations are increasingly carried out by modern weldability studies, i. e. considering interactions between the selected base and filler materials, structural design and welding process. Such weldability investigations are particularly targeted to prevent hot cracking, as one of the most common cracking phenomena occurring during weld fabrication. To provide an international information and discussion platform to combat hot cracking, an international workshop on Hot Cracking Phenomena in Welds has been created, based on an initiative of the Institute for Materials and Joining Technology at the Otto-von-Guericke University in Magdeburg and the Division V. 5 – Safety of Joined Components at the Federal Institute for Materials Research and Testing (BAM) in Berlin, Germany. The first workshop was organized in Berlin under the topics mechanisms and phenomena, metallurgy and materials, modelling and simulations as well as testing and standardization. It consisted of 20 individual contributions from eight countries, which were compiled in a book that found a very ready market, not only in the welding community. As a consequence of increasing interest, it has been decided to establish the Workshop on Hot Cracking Phenomena in Welds as a regular event every three years embedded in the International Institute of Welding (IIW). Attached to the IIW Commission IX and II Spring intermediate meetings, the second workshop was organized in March 2007.
Book Synopsis Evaluation of Weld Solidification Cracking in Aluminum Alloys A1- 2219 and A1-2090 Using the Gleeble 1500 System by : Chih-Chang Chen
Download or read book Evaluation of Weld Solidification Cracking in Aluminum Alloys A1- 2219 and A1-2090 Using the Gleeble 1500 System written by Chih-Chang Chen and published by . This book was released on 1991 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Susceptibility of Aluminium Alloys to Solidification Cracking by : Tayfun Soysal
Download or read book Susceptibility of Aluminium Alloys to Solidification Cracking written by Tayfun Soysal and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solidification cracking is a serious weld defect in welding aluminum (Al) alloys. It occurs in the mushy zone (a small weak semisolid immediately behind the weld pool) when the critical strain rate of the mushy zone is exceeded. Most tests for evaluating the solidification cracking susceptibility cannot determine the critical strain rate of the mushy zone. In the present thesis, welding of Al alloys was studied using a new test for evaluating the crack susceptibility and a new index for predicting the crack susceptibility. The test, called the transverse motion weldability (TMW) test, was developed. This test is unique in that a stationary upper sheet is lap-welded to a lower sheet moving slowly at the speed V in the transverse direction of welding to induce transverse tensile strain and hence cracking in the mushy zone. Cracking occurs when a critical V, i.e., V[c], is exceeded. The TMW test showed that the susceptibility to solidification cracking increased in the order of 2219 Al, 2014 Al, 2024 Al, 7075 Al and 6061 Al. This ranking is consistent with that based on other tests. It is also consistent with that predicted based on the crack susceptibility index, which is the maximum -dT/d(f[S])[1/2]- (where T is temperature and f[S] fraction of solid). The test was also used to see how effective Al filler metals reduce the crack susceptibility of Al alloys. The effectives observed agreed with that reported previously, shown in filler-metal guides, and predicted based on the index. To determine the local strain rate in the mushy zone near the crack, a new approach based on the TMW test and the weld microstructure was developed. Crack susceptibility of commercial wrought aluminum alloys were explained to provide a better understanding for solidification cracking.
Book Synopsis Hot Cracking Phenomena in Welds by : Thomas Böllinghaus
Download or read book Hot Cracking Phenomena in Welds written by Thomas Böllinghaus and published by Springer Science & Business Media. This book was released on 2005-10-20 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the avoidance of hot cracking still represents a major topic in modern fabrication welding components, the phenomena have not yet been fully understood. Through the 20 individual contributions from experts all over the world the present state of knowledge about hot cracking during welding is defined, and the subject is approached from four different viewpoints. The first chapter provides an overview of the various hot cracking phenomena. Different mechanisms of solidification cracking proposed in the past decades are summarized and new insight is particularly given into the mechanism of ductility dip cracking. The effects of different alloying elements on the hot cracking resistance of various materials are shown in the second chapter and, as a special metallurgical effect, the initiation of stress corrosion cracking at hot cracks has been highlighted. The third chapter outlines how numerical analyses and other modelling techniques can be utilized to describe hot cracking phenomena and how such results might contribute to the explanation of the mechanisms. Various hot cracking test procedures are presented in the final chapter with a special emphasis on standardization. For the engineering and natural scientists in research and development the book provides both, new insight and a comprehensive overview of hot cracking phenomena in welds. The contributions additionally give numerous individual solutions and helpful advice for international welding engineers to avoid hot cracking in practice. Furthermore, it represents a very helpful tool for upper level metallurgical and mechanical engineering students.
Book Synopsis The Evaluation of the Weldability of Structural Alloys with the Varestraint Test by : Warren F. Savage
Download or read book The Evaluation of the Weldability of Structural Alloys with the Varestraint Test written by Warren F. Savage and published by . This book was released on 1968 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a sub-scale version of the VARESTRAINT test is described which permits the evaluation of the hot cracking sensitivity of materials with thicknesses of 1/8-in. and below. The hot cracking tendency of several plate and sheet materials was evaluated using the standard and sub-scale versions of the VARESTRAINT test, respectively. The heat-to-heat variation in hot cracking sensitivity was studied for 22 Heats of D6AC and significant differences were observed. Metallographic studies of the morphology of hot cracking are presented for each alloy. A mathematical analysis of the thermally induced strains around the weld puddle is presented for 2014T-6 aluminum. (Author).
Book Synopsis The Varestraint Test by : Carl D. Lundin
Download or read book The Varestraint Test written by Carl D. Lundin and published by . This book was released on 1982 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cracking Phenomena in Welds IV by : Thomas Böllinghaus
Download or read book Cracking Phenomena in Welds IV written by Thomas Böllinghaus and published by Springer. This book was released on 2016-02-10 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the fourth volume in the well-established series of compendiums devoted to the subject of weld hot cracking. It contains the papers presented at the 4th International Cracking Workshop held in Berlin in April 2014. In the context of this workshop, the term “cracking” refers to hot cracking in the classical and previous sense, but also to cold cracking, stress-corrosion cracking and elevated temp. solid-state cracking. A variety of different cracking subjects are discussed, including test standards, crack prediction, weldability determination, crack mitigation, stress states, numerical modelling, and cracking mechanisms. Likewise, many different alloys were investigated such as aluminum alloys, copper-aluminum dissimilar metal, austenitic stainless steel, nickel base alloys, duplex stainless steel, creep resistant steel, and high strength steel.
Book Synopsis Hot Cracking Phenomena in Welds III by : John Lippold
Download or read book Hot Cracking Phenomena in Welds III written by John Lippold and published by Springer Science & Business Media. This book was released on 2011-05-03 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the third in a series of compendiums devoted to the subject of weld hot cracking. It contains 22 papers presented at the 3rd International Hot Cracking Workshop in Columbus, Ohio USA in March 2010. In the context of this workshop, the term “hot cracking” refers to elevated temperature cracking associated with either the weld metal or heat-affected zone. These hot cracking phenomena include weld solidification cracking, HAZ and weld metal liquation cracking, and ductility-dip cracking. The book is divided into three major sections based on material type; specifically aluminum alloys, steels, and nickel-base alloys. Each of these sections begins with a keynote paper from prominent researchers in the field: Dr. Sindo Kou from the University of Wisconsin, Dr. Thomas Böllinghaus from BAM and the University of Magdeburg, and Dr. John DuPont from Lehigh University. The papers contained within include the latest insight into the mechanisms associated with hot cracking in these materials and methods to prevent cracking through material selection, process modification, or other means. The three Hot Cracking Phenomena in Welds compendiums combined contain a total of 64 papers and represent the best collection of papers on the topic of hot cracking ever assembled.
Book Synopsis DETERMINATION OF WELDING PARAMETER DEPENDENT HOT CRACKING SUSCEPTIBILITY OF 5086-H32 ALUMINIUM ALLOY WITH THE USE OF MVT METHOD. by :
Download or read book DETERMINATION OF WELDING PARAMETER DEPENDENT HOT CRACKING SUSCEPTIBILITY OF 5086-H32 ALUMINIUM ALLOY WITH THE USE OF MVT METHOD. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hot cracking is a serious problem that encounters during welding of aluminium-magnesium alloys. In the present study, solidification and liquation type of hot cracks in weld metal and the heat-affected zones of 5086-H32 aluminium alloy were investigated by using Modified Varestraint Test (MVT) with TIG-AC and TIG-DC welding. With determining the size, type and number of cracks, a relation was established between welding line energy and strain on the hot crack formation. This information was used to determine the hot crack safe parameter ranges. The hot cracking tendency as a function of applied parameters were discussed in the frame of temperature fields around the moving heat source. Moreover, the characteristic hot crack locations on the 5086-H32 MVT specimens were generalized. The results of the study indicated that the increase in line energy and strain increased the hot cracking tendency of the specified aluminium alloy. In the low line energy range, the main hot cracking mechanism is the solidification cracking which could be overcome by the use of a suitable filler material. At high line energy range, due to the increased amount of interdendritic liquid, the amount of solidification cracking decreases by healing mechanism. However, because of the enlarged-temperature-field around the weld zone, fraction of HAZ cracking increases. The comparison between the hot cracking tendencies in low and high line energies indicates that the low line energy ranges with low augmented strains resulted in hot crack safer parameters.
Book Synopsis Welding Metallurgy and Weldability by : John C. Lippold
Download or read book Welding Metallurgy and Weldability written by John C. Lippold and published by John Wiley & Sons. This book was released on 2014-11-24 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the weldability aspects of structural materials used in a wide variety of engineering structures, including steels, stainless steels, Ni-base alloys, and Al-base alloys Welding Metallurgy and Weldability describes weld failure mechanisms associated with either fabrication or service, and failure mechanisms related to microstructure of the weldment. Weldability issues are divided into fabrication and service related failures; early chapters address hot cracking, warm (solid-state) cracking, and cold cracking that occur during initial fabrication, or repair. Guidance on failure analysis is also provided, along with examples of SEM fractography that will aid in determining failure mechanisms. Welding Metallurgy and Weldability examines a number of weldability testing techniques that can be used to quantify susceptibility to various forms of weld cracking. Describes the mechanisms of weldability along with methods to improve weldability Includes an introduction to weldability testing and techniques, including strain-to-fracture and Varestraint tests Chapters are illustrated with practical examples based on 30 plus years of experience in the field Illustrating the weldability aspects of structural materials used in a wide variety of engineering structures, Welding Metallurgy and Weldability provides engineers and students with the information needed to understand the basic concepts of welding metallurgy and to interpret the failures in welded components.
Book Synopsis Welding Metallurgy and Weldability of Nickel-Base Alloys by : John C. Lippold
Download or read book Welding Metallurgy and Weldability of Nickel-Base Alloys written by John C. Lippold and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most up-to-date coverage of welding metallurgy aspects and weldability issues associated with Ni-base alloys Welding Metallurgy and Weldability of Nickel-Base Alloys describes the fundamental metallurgical principles that control the microstructure and properties of welded Ni-base alloys. It serves as a practical how-to guide that enables engineers to select the proper alloys, filler metals, heat treatments, and welding conditions to ensure that failures are avoided during fabrication and service. Chapter coverage includes: Alloying additions, phase diagrams, and phase stability Solid-solution strengthened Ni-base alloys Precipitation strengthened Ni-base alloys Oxide dispersion strengthened alloys and nickel aluminides Repair welding of Ni-base alloys Dissimilar welding Weldability testing High-chromium alloys used in nuclear power applications With its excellent balance between the fundamentals and practical problem solving, the book serves as an ideal reference for scientists, engineers, and technicians, as well as a textbook for undergraduate and graduate courses in welding metallurgy.
Book Synopsis Aluminum-Lithium Alloys for Aerospace Applications Workshop by : Biliyar N. Bhat
Download or read book Aluminum-Lithium Alloys for Aerospace Applications Workshop written by Biliyar N. Bhat and published by . This book was released on 1994 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solidification Cracking, Grain Structure and Grain Refining Mechanisms in GTA Welds of Aluminum Alloys by : Yiping Le
Download or read book Solidification Cracking, Grain Structure and Grain Refining Mechanisms in GTA Welds of Aluminum Alloys written by Yiping Le and published by . This book was released on 1986 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Welding Metallurgy and Weldability by : John C. Lippold
Download or read book Welding Metallurgy and Weldability written by John C. Lippold and published by John Wiley & Sons. This book was released on 2014-11-10 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the weldability aspects of structural materials used in a wide variety of engineering structures, including steels, stainless steels, Ni-base alloys, and Al-base alloys Welding Metallurgy and Weldability describes weld failure mechanisms associated with either fabrication or service, and failure mechanisms related to microstructure of the weldment. Weldability issues are divided into fabrication and service related failures; early chapters address hot cracking, warm (solid-state) cracking, and cold cracking that occur during initial fabrication, or repair. Guidance on failure analysis is also provided, along with examples of SEM fractography that will aid in determining failure mechanisms. Welding Metallurgy and Weldability examines a number of weldability testing techniques that can be used to quantify susceptibility to various forms of weld cracking. Describes the mechanisms of weldability along with methods to improve weldability Includes an introduction to weldability testing and techniques, including strain-to-fracture and Varestraint tests Chapters are illustrated with practical examples based on 30 plus years of experience in the field Illustrating the weldability aspects of structural materials used in a wide variety of engineering structures, Welding Metallurgy and Weldability provides engineers and students with the information needed to understand the basic concepts of welding metallurgy and to interpret the failures in welded components.
Book Synopsis Study of Test Methods for Welding Cracks of Weldable Structural Aluminum Alloys by :
Download or read book Study of Test Methods for Welding Cracks of Weldable Structural Aluminum Alloys written by and published by . This book was released on 1976 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Weld Solidification Cracking in Cast Nickel Aluminide Alloys by :
Download or read book Analysis of Weld Solidification Cracking in Cast Nickel Aluminide Alloys written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
