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Role of Defects Interactions with Embrittlement Species in Iron: a Multiscale Perspective

Abstract Hydrogen embrittlement (HE) is a phenomenon that affects both the physical and chemical properties of several intrinsically ductile metals. Consequently, understanding the mechanisms behind HE has been of particular interest in both experimental and modeling research. Discrepancies between experimental observations and modeling results have led to various proposals for HE mechanisms. Therefore, to gain insights into HE mechanisms in iron, this dissertation aims to investigate several key issues involving HE such as: a) the incipient crack tip events; b) the cohesive strength of grain boundaries (GBs); c) the dislocation-GB interactions and d) the dislocation mobility.

The crack tip, which presents a preferential trap site for hydrogen segr... (more)
Created Date 2015
Contributor Adlakha, Ilaksh (Author) / Solanki, Kiran (Advisor) / Mignolet, Marc (Committee member) / Chawla, Nikhilesh (Committee member) / Jiang, Hanqing (Committee member) / Liu, Yongming (Committee member) / Arizona State University (Publisher)
Subject Mechanical engineering / Materials Science / Mechanics / crack / dislocations / grain boundaries / hydrogen embrittlement / molecular dynamics / triple junctions
Type Doctoral Dissertation
Extent 165 pages
Language English
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Mechanical Engineering 2015
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS

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Description Dissertation/Thesis