{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/20408"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/20408","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Hydrogen-enhanced transient creep of 310S and AL 29-4-2 stainless steel","abstract":"Transient creep of hydrogenated 310S and AL 29-4-2 stainless steels at ambient temperatures was studied to determine the effects of hydrogen on plastic deformation. Thin specimens were slowly cathodically charged to uniform hydrogen contents, and no significant damage was introduced. A constant load was then applied while the charging current density remained the same, so as to prevent outgassing of the hydrogen during creep tests. It was found in 310S that at short times the creep rate of a hydrogenated specimen was lower than for a specimen without hydrogen. However, the creep rate decreased at a slower rate thereafter, so that the transient creep stage was longer, and in some cases, the creep strain was even larger than in a hydrogen-free specimen. In AL 29-4-2, the hydrogenated specimen had a higher creep rate than the uncharged specimen from beginning to the end of the creep test. This is clear evidence of hydrogen-enhanced plasticity. Elastic interactions between hydrogen atmospheres and moving dislocations were used to explain the observed phenomenon. Hydrogen-enhancement and localization of plasticity have been cited as fundamental causes of hydrogen embrittlement. The prolongation of the transient creep stage has significance for propagation of stress corrosion cracks.","abstract_html":"Transient creep of hydrogenated 310S and AL 29-4-2 stainless steels at ambient temperatures was studied to determine the effects of hydrogen on plastic deformation. Thin specimens were slowly cathodically charged to uniform hydrogen contents, and no significant damage was introduced. A constant load was then applied while the charging current density remained the same, so as to prevent outgassing of the hydrogen during creep tests. It was found in 310S that at short times the creep rate of a hydrogenated specimen was lower than for a specimen without hydrogen. However, the creep rate decreased at a slower rate thereafter, so that the transient creep stage was longer, and in some cases, the creep strain was even larger than in a hydrogen-free specimen. In AL 29-4-2, the hydrogenated specimen had a higher creep rate than the uncharged specimen from beginning to the end of the creep test. This is clear evidence of hydrogen-enhanced plasticity. Elastic interactions between hydrogen atmospheres and moving dislocations were used to explain the observed phenomenon. Hydrogen-enhancement and localization of plasticity have been cited as fundamental causes of hydrogen embrittlement. The prolongation of the transient creep stage has significance for propagation of stress corrosion cracks.","abstract_has_math":false,"creators":["Tien, Chee Wain"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Materials Engineering","degree_department":null,"school":null,"contributors":["Altstetter, Carl J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T12:38:22Z","date_published":"2011-05-07T12:38:22Z","updated_at":"2026-07-22T22:25:15Z","subjects":["Engineering, Metallurgy","Engineering, Materials Science"],"languages":["eng"],"rights":["Copyright 1994 Tien, Chee Wain"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9503337","(UMI)AAI9503337"],"render_values":[{"text":"AAI9503337","href":null,"code":true},{"text":"(UMI)AAI9503337","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/20408","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Altstetter, Carl J."]},{"key":"dc:creator","label":"Author","values":["Tien, Chee Wain"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T12:38:22Z","10000-01-01","1994"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Metallurgy","Engineering, Materials Science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1994 Tien, Chee Wain"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9503337","(UMI)AAI9503337","http://hdl.handle.net/2142/20408"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Transient creep of hydrogenated 310S and AL 29-4-2 stainless steels at ambient temperatures was studied to determine the effects of hydrogen on plastic deformation. Thin specimens were slowly cathodically charged to uniform hydrogen contents, and no significant damage was introduced. A constant load was then applied while the charging current density remained the same, so as to prevent outgassing of the hydrogen during creep tests. It was found in 310S that at short times the creep rate of a hydrogenated specimen was lower than for a specimen without hydrogen. However, the creep rate decreased at a slower rate thereafter, so that the transient creep stage was longer, and in some cases, the creep strain was even larger than in a hydrogen-free specimen. In AL 29-4-2, the hydrogenated specimen had a higher creep rate than the uncharged specimen from beginning to the end of the creep test. This is clear evidence of hydrogen-enhanced plasticity. Elastic interactions between hydrogen atmospheres and moving dislocations were used to explain the observed phenomenon. Hydrogen-enhancement and localization of plasticity have been cited as fundamental causes of hydrogen embrittlement. The prolongation of the transient creep stage has significance for propagation of stress corrosion cracks.","Made available in DSpace on 2011-05-07T12:38:22Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9503337.pdf: 4447366 bytes, checksum: 248e5eedef8a2de3e4e873da3442b9d8 (MD5) Previous issue date: 1994","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:43:42Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:19:09-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Hydrogen-enhanced transient creep of 310S and AL 29-4-2 stainless steel"]}]}],"canonical_facts":{"dc:contributor":["Altstetter, Carl J."],"dc:creator":["Tien, Chee Wain"],"dc:date":["2011-05-07T12:38:22Z","10000-01-01","1994"],"dc:description":["Transient creep of hydrogenated 310S and AL 29-4-2 stainless steels at ambient temperatures was studied to determine the effects of hydrogen on plastic deformation. Thin specimens were slowly cathodically charged to uniform hydrogen contents, and no significant damage was introduced. A constant load was then applied while the charging current density remained the same, so as to prevent outgassing of the hydrogen during creep tests. It was found in 310S that at short times the creep rate of a hydrogenated specimen was lower than for a specimen without hydrogen. However, the creep rate decreased at a slower rate thereafter, so that the transient creep stage was longer, and in some cases, the creep strain was even larger than in a hydrogen-free specimen. In AL 29-4-2, the hydrogenated specimen had a higher creep rate than the uncharged specimen from beginning to the end of the creep test. This is clear evidence of hydrogen-enhanced plasticity. Elastic interactions between hydrogen atmospheres and moving dislocations were used to explain the observed phenomenon. Hydrogen-enhancement and localization of plasticity have been cited as fundamental causes of hydrogen embrittlement. The prolongation of the transient creep stage has significance for propagation of stress corrosion cracks.","Made available in DSpace on 2011-05-07T12:38:22Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9503337.pdf: 4447366 bytes, checksum: 248e5eedef8a2de3e4e873da3442b9d8 (MD5) Previous issue date: 1994","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:43:42Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:19:09-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9503337","(UMI)AAI9503337","http://hdl.handle.net/2142/20408"],"dc:language":["eng"],"dc:rights":["Copyright 1994 Tien, Chee Wain"],"dc:subject":["Engineering, Metallurgy","Engineering, Materials Science"],"dc:title":["Hydrogen-enhanced transient creep of 310S and AL 29-4-2 stainless steel"],"dc:type":["text"],"thesis:degree_discipline":["Materials Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:15Z"}