Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 161 for “"Embrittlement"”.
-
Hydrogen Embrittlement of Nickel
Experiments were performed to determine the effects of hydrogen segregation at grain boundaries on intergranular fracture of charged nickel deformed in tension. Two modes of hydrogen segregation are investigated; lattice diffusion and dislocation transport of "Cottrell atmospheres" of hydrogen. The …
-
Hydrogen Embrittlement in Niobium
Made available in DSpace on 2014-12-14T16:00:34Z (GMT). No. of bitstreams: 1 7803997.pdf: 3565703 bytes, checksum: ddb1ac27d35f87da6a53e3f4052e1f74 (MD5) Previous issue date: 1977
-
Hydrogen embrittlement: an interfacial phenomenon
… the mechanical properties of metals. Hydrogen embrittlement processes in austenitic stainless steel, mild steel and aluminum occurred primarily by hydrogen induced weakening of the interfaces associated with specific metallographic features. In impact and slow bend tests of 21-6-9 and 304L …
-
Low Temperature Hydrogen Embrittlement in Niobium
Made available in DSpace on 2014-12-14T16:00:28Z (GMT). No. of bitstreams: 1 7524312.pdf: 6849199 bytes, checksum: ebb8b2c74299d704140065f27f6ecb68 (MD5) Previous issue date: 1975
-
Low temperature hydrogen embrittlement in niobium
Submitted by Minhao Jiang (mjiang14@illinois.edu) on 2013-10-15T01:43:28Z No. of bitstreams: 1 1975_grossbeck.pdf: 4793625 bytes, checksum: 8c715c8dff8d89abf5d540ca50435e1d (MD5)
-
Hydrogen embrittlement of Aluminum-Lithium alloys
The objective of this work is to study the effects of dissolved hydrogen on the mechanical properties of aluminum-lithium alloys: 2090, 2091, and Weldalite 049, and to compare with the effects on aluminum-copper 2219 alloy. Prior to mechanical testing, aging studies were performed for 2090 and 2219 …
-
Computational modeling of hydrogen embrittlement of iron aluminides
… extrinsically more susceptible to environmental embrittlement than the base ternary alloy (FA186) under constant tensile loading condition. This may due to the effect of smaller grain sizes caused by alloy addition. To further investigate the grain boundary size effect as related to the …
-
Hydrogen embrittlement of an Al-4.5Zn-2.5Mg alloy
… are interpreted as indicating that a hydrogen embrittlement mechanism is operative whereby hydrogen, generated by a corrosion reaction, embrittles the alloy. Activation energy determinations have been made for stress corrosion crack growth at the free corrosion potential, and the activation …
-
Embrittlement and Flow Localization of Reactor Structural Materials
Notch effects have been analyzed utilizing finite element method (FEM) and EBSD misorientation map for unirradiated and irradiated 316L stainless steel. The major issue of interest is the possibility that low ductility, often found following irradiation exposure, will translate into low notch …
-
Embrittlement of Austenitic Stainless Steels by Solute Hydrogen
Mechanical properties of austenitic stainless steel were determined as a function of solute hydrogen concentration. Twenty micron thick foils of types 310s and 304 stainless steel were cathodically precharged to saturation and tested in tension at room temperature. X-ray diffraction experiments …
-
Embrittlement mechanisms of nickel-base alloys in water
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1987.
-
Hydrogen embrittlement of selected nickel and iron-base superalloys
Made available in DSpace on 2011-05-07T14:12:15Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9114264.pdf: 8376451 bytes, checksum: 0a2e91e90f19192aa850c4cce03a90fe (MD5) Previous issue date: 1990
-
Microstructure influence on hydrogen permeation and embrittlement of 4140 steel
En esta tesis se han realizado tratamientos térmicos de temple y revenido y diferentes tratamientos de normalizado y recocido sobre un acero estructural de media aleación (grado 4140) y se ha analizado primero su influencia en la microestructura y propiedades mecánicas fundamentales. A …
-
Study of tempered martensite embrittlement in 4130 type steels, A
Includes bibliographical references (pages 97-102).
-
Segregation and embrittlement in metallic interfaces : bounds, models, and trends
… is typically associated with grain boundary embrittlement [8]. In the latter part of this thesis, I demonstrate general principles for the design thermally stable nanocrystalline metals without compromising grain boundary cohesion. More specifically, I create an analytical model of grain …
-
Hydrogen embrittlement testing of austenitic stainless steels SUS 316 and 316L
… service are properly tested for hydrogen embrittlement resistance. To assess material behavior in a pressurized hydrogen environment, procedures were designed to test materials for susceptibility to hydrogen embrittlement. Of particular interest to the field of high-pressure hydrogen in …
-
Hydrogen embrittlement testing of alloy 718 for oil and gas applications
Hydrogen embrittlement of Ni-base corrosion resistant alloys (CRAs) can occur in deep sea oil wells when components are exposed to hydrogen while under stress. The effects of microstructure on hydrogen embrittlement of precipitation hardened Ni-base CRAs, such as alloy 718, are not fully …
-
The first high-strength bainitic steel designed for hydrogen embrittlement resistance
The phenomenon of hydrogen embrittlement in steel has been known for over 150 years. Hydrogen-resistant alloys have been developed to mitigate this effect and three types of alloys with optimised structures have been enhanced over the years: nickel alloys, stainless steels, and quenched and …
Page 1 of 9