2026-09-21T12:19:58Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/87712 2023-07-11 col_2142_5131 col_2142_46414 com_2142_5130 com_2142_178 com_2142_234

Sofronis, Petros Liang, Yueming 2015-09-28T16:23:36Z 2015-09-28T16:23:36Z 10000-01-01 2003 2003 A traction-separation law that describes the cohesion of an interface in the presence of hydrogen is suggested and implemented through interfacial cohesive finite elements to study interfacial debonding around an elastic particle imbedded in an elastoplastically deforming matrix, while transient hydrogen transport takes place in the matrix, the particle, and the opening interfacial channel. Finite element analyses demonstrate that both hydrogen-induced reduction of interfacial cohesion and matrix softening acting concurrently lead to a reduction of the void nucleation stress at the particle-matrix interface. However, while hydrogen-induced decohesion decreases the void nucleation strain, matrix-softening increases it. Some other issues such as the effect of interfacial diffusivity and strain rate on decohesion are also addressed. Numerical simulations of hydrogen-induced intergranular fracture in nickel-base alloy 690 have been carried out. It is found that hydrogen induced intergranular fracture process in alloy 690 is controlled by the separation process at the interfaces between the grain boundary carbides and the nickel matrix. Made available in DSpace on 2015-09-28T16:23:36Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3086120.pdf: 11039720 bytes, checksum: 2b0c50e19efda75eb2c2ba86157a02c7 (MD5) Previous issue date: 2003 Embargo set by: Seth Robbins for item 88993 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 211 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003. http://hdl.handle.net/2142/87712 (MiAaPQ)AAI3086120 eng Engineering, Materials Science Micromechanics of the Hydrogen Effect on Plasticity and Interfacial Decohesion text Theoretical and Applied Mechanics Theoretical and Applied Mechanics University of Illinois at Urbana-Champaign Dissertation Ph.D.