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Hydrogen Embrittlement In Two Titanium Alloys Under Sustained And Fatigue Loadings
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Book Synopsis Hydrogen Embrittlement in Two ?/??titanium Alloys Under Sustained and Fatigue Loadings by : Neville R. Moody
Download or read book Hydrogen Embrittlement in Two ?/??titanium Alloys Under Sustained and Fatigue Loadings written by Neville R. Moody and published by . This book was released on 1981 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Maco/Micro Studies of Hydrogen Embrittlement Mechanisms in Titanium and Aluminum Alloys by : W. W. Gerberich
Download or read book Maco/Micro Studies of Hydrogen Embrittlement Mechanisms in Titanium and Aluminum Alloys written by W. W. Gerberich and published by . This book was released on 1981 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systematic studies of environmental effects on fracture in two alpha/beta titanium alloys, one beta titanium alloy and 7475 aluminum alloys have been accomplished. Ti-6Al-6V-2Sn has been tested for its hydrogen-induced cracking behavior under sustained loads. The influence of frequency and microstructure on fatigue crack growth have also been studied. Fatigue crack growth in Ti-5A1-4Mo, as a function of hydrogen content, temperature and Widmanstatten colony size, was then studied. Mechanical data have been obtained along with TEM and SEM characterizations. Modelling for fatigue thresholds has been attempted to explain dislocation, microstructure and hydrogen effects. Ti-30 Mo has been studied for effects of hydrogen on dislocation dynamics, cleavage fracture stress and fatigue crack propagation. Fractography (SEM) has been used to characterize the fracturing processes and modeling attempted to explain the hydrogen effects. Hydrogen effects in aluminum alloys are not as obvious as those in titanium alloys. Both cathodic and gas-phase charging did not significantly increase the hydrogen content of this material. Mechanical properties did not seem to change decisively after hydrogen charging. But the lack of a macroscopic effect does not preclude a hydrogen mechanism in environmentally assisted events. (Author).
Book Synopsis Hot-salt Stress-corrosion of Titanium Alloys by : Hugh R. Gray
Download or read book Hot-salt Stress-corrosion of Titanium Alloys written by Hugh R. Gray and published by . This book was released on 1969 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Report on Hydrogen in Titanium and Titanium Alloys by : Dean N. Williams
Download or read book Report on Hydrogen in Titanium and Titanium Alloys written by Dean N. Williams and published by . This book was released on 1958 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogen-Related Degradation of Mechanical Properties of Titanium and Titanium Alloys by : Kenzo Asaoka
Download or read book Hydrogen-Related Degradation of Mechanical Properties of Titanium and Titanium Alloys written by Kenzo Asaoka and published by . This book was released on 2009 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen can have a pronounced effect on the mechanical properties of titanium (Ti) and Ti alloys, such as deformation, fracture, and fatigue life. The delayed fracture of medical Ti alloy devices is commonly caused by hydrogen embrittlement. Experimentally, we confirmed that the degradation in the performance of Ni-Ti superelastic alloy is caused by the hydrogen absorption related with specific factors in vivo; i.e., hydrogen embrittlement is related to such factors as sustained stress, in vivo environment (pH and potential), and surface chemistry. In our research a thermal desorption gas spectrometer (TDS) was used to measure the hydrogen content in the alloys without fusion. The measured hydrogen concentration showed clearly that the hydrogen concentration affects considerably the degradation of the mechanical properties. It is unclear how the alloy can naturally absorb hydrogen under biological circumstances. However, it is suspected that the hydrogen absorption is related to galvanic currents, fretting corrosion, hydrogen ions in a biological fluid, and changes in pH under biostructures, biofilms, and tumors. It may lead to the degradation of their mechanical properties by hydrogen absorption in vivo. Also the processes of medical Ti alloy devices, such as pickling, are associated with their hydrogen content. Thus, the estimation of the hydrogen absorption in vivo in relation to surface features is required to evaluate its effect on such properties as fatigue and the service life of the Ni-Ti alloys used as medical devices.
Book Synopsis Hydrogen Embrittlement of Titanium Alloys by : A. E. Riesen
Download or read book Hydrogen Embrittlement of Titanium Alloys written by A. E. Riesen and published by . This book was released on 1960 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Hydrogen Embrittlement of Titanium Alloys by : David Louis Arditti
Download or read book The Hydrogen Embrittlement of Titanium Alloys written by David Louis Arditti and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Hydrogen in Hot-salt Stress Corrosion Cracking of Titanium-aluminum Alloys by : R. S. Ondrejcin
Download or read book The Role of Hydrogen in Hot-salt Stress Corrosion Cracking of Titanium-aluminum Alloys written by R. S. Ondrejcin and published by . This book was released on 1971 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogen Contamination in Titanium and Titanium Alloys by : D. N. Williams
Download or read book Hydrogen Contamination in Titanium and Titanium Alloys written by D. N. Williams and published by . This book was released on 1959 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Role of Hydrogen in Hot-salt Stress-corrosion of a Titanium Alloy by : Hugh R. Gray
Download or read book Role of Hydrogen in Hot-salt Stress-corrosion of a Titanium Alloy written by Hugh R. Gray and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen embrittlement during hot salt, stress corrosion of titanium alloys.
Book Synopsis Hydrogen Contamination in Titanium and Titanium Alloys, Part V. Hydrogen Embrittlement by : D. N. WILLIAMS
Download or read book Hydrogen Contamination in Titanium and Titanium Alloys, Part V. Hydrogen Embrittlement written by D. N. WILLIAMS and published by . This book was released on 1959 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aqueous Chloride Stress Corrosion Cracking of Titanium: A Comparison with Environmental Hydrogen Embrittlement by :
Download or read book Aqueous Chloride Stress Corrosion Cracking of Titanium: A Comparison with Environmental Hydrogen Embrittlement written by and published by . This book was released on 1973 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress-Induced Hydrogen Concentration in Titanium by : Philip N. Adler
Download or read book Stress-Induced Hydrogen Concentration in Titanium written by Philip N. Adler and published by . This book was released on 1981 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changes in hydrogen concentration that accompany application of a stress-gradient were characterized in titanium alloys so that the influence of stress on hydrogen embrittlement can be understood. In situ measurement of hydrogen was made useing the nuclear microprobe for hydrogen (NMH). A nondestructive depth-profiling technique that utilizes the IH(7Li, gamma)8Be resonant nuclear reaction. Stress gradients were applied by four-point bending. Single phase alloys of beta-Ti and alpha-Ti, as well as different alpha/beta morphologies of Ti-6Al-4V alloy, were examined. Hydrogen redistribution was observed in all the beta-phase alloys under an elastic stress gradient, but no further change accompanied plastic deformation. The extent of hydrogen change in high-purity alloys was approximately two times greater than in commercial alloys. Based on this difference and measurements of the partial molal volume of hydrogen in selected alloys, it was concluded that a portion of hydrogen in the commercial alloys was not available for redistribution and was, therefore, trapped. Factors such as hydrogen content, oxygen content, and cold working were not found to change the extent of hydrogen trapping. The practical significance of trapping lies in its possible use to reduce the deleterious influence of hydrogen. The diffusion coefficient in these alloys was also determined under both elastic and plastic loadings and was found to be relatively uniform, approximately 1 time 10 to the minus 6 sq cm. per s, and consistent with those previously reported for beta-Ti.
Book Synopsis Hydrogen Embrittlement and Stress Corrosion Cracking of Titanium Alloys Caused by Cleaning Processes by : Society of Automotive Engineers, Inc
Download or read book Hydrogen Embrittlement and Stress Corrosion Cracking of Titanium Alloys Caused by Cleaning Processes written by Society of Automotive Engineers, Inc and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Delayed-cracking Phenomenon in Hydrogenated Unalloyed Titanium by : R. A. Wood
Download or read book Investigation of Delayed-cracking Phenomenon in Hydrogenated Unalloyed Titanium written by R. A. Wood and published by . This book was released on 1961 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three grades of unalloyed titanium were studied to determine the effect of variations in O and N contents on delayed cracking. The bar stock was analyzed for interstitial content, then vacuum annealed to remove most of the H. Large samples of the 1/2-in.-diam vaccum-annealed stock were subsequently hydrogenated to about 90 and 160 ppm H levels. Hydrogen-induced strainaging embrittlement at ambient temperatures in interstitial-containing alphi Ti was not indicated by the results of stress-rupture tests. The results indicate that strain-aging embrittlement does not occur in unalloyed Ti having up to 0.38 wt-% O with as much as 160 ppm H content. However, a noticable effect of H on notch sensitivity of the materials, in the alpha-annealed and especially in the beta-annealed conditions, was observed. It appears probable that H was concentrated in the critical areas by a thermaldiffusion process to create an ultrasensitive zone. Failure might have occurred subsequently as a result of simple overstressing, or by accidentally applied impact stresses, or by a more complicated low-cycle fatigue mechanism. (Author).
Book Synopsis Determination of Tests for Hydrogen Embrittlement Titanium Alloys by : Albert H. Fleitman
Download or read book Determination of Tests for Hydrogen Embrittlement Titanium Alloys written by Albert H. Fleitman and published by . This book was released on 1957 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogen Embrittlement of Titanium and Its Alloys by : Irina Aho-Mantila
Download or read book Hydrogen Embrittlement of Titanium and Its Alloys written by Irina Aho-Mantila and published by . This book was released on 1988 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
