{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/20139"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/20139","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Stress corrosion cracking of austenitic stainless steels","abstract":"In order to understand the stress corrosion cracking behavior of metastable and stable austenitic stainless steels, constant elongation rate tests (CERT) and sub-critical crack growth (SCG) tests were used to measure the susceptibility and cracking rate. The tests were performed in H$\\sb2$SO$\\sb4$/NaCl solutions in the pH ranges from 0 to 7 and at temperatures from 25 to 75$\\sp\\circ$C. The AISI 301 (metastable) and AISI 310S (stable) alloys were used for these tests. In CERT, the 301 alloy showed susceptible to SCC while 310S did not. In SCG tests, SCG behavior was analysed with respect to applied potential zones on the polarization curve, i.e. cathodic, active (zone 1), active/passive (zone 2) and passive/transpassive (zone 3). It was found that hydrogen embrittlement (HE) was the main cracking process in zone 1 and cathodic zone for annealed specimens. For deformed specimens, HE was operative in the cathodic zone, but in zone 1 the behavior was not clearly HE. Film rupture and active path corrosion were found to proceed in zone 3. In zone 2, SCC seemed to proceed by a mixture of models. The HE characteristics in 301 alloy was believed to be related to the rate of accumulation of hydrogen at the crack tip. Since stain-induced $\\alpha\\sp\\prime$ phase was verified on the fracture surface, $\\alpha\\sp\\prime$ was considered to play an important role in the HE process. The fast diffusion rate of hydrogen in $\\alpha\\sp\\prime$ phase and low escape rate of hydrogen in the surrounding $\\gamma$ phase were believed to be the cause of HE. At potentials more noble than zone 1, the smaller hydrogen charging rate (HCR) was believed to be the cause of immunity to HE, resulting in predominance of dissolution or active path corrosion (APC). The HE process was found to be strengthened by hydrogen recombination poison (NaAsO$\\sb2$) in zone 1 and cathodic zone, although it was a corrosion inhibitor. For 310S alloy, 3-stage SCG behavior was observed in pH $$ 4N. A ductile failure morphology was identified for 310S alloy tested in the above solution. The resistance of 310S to SCC was thought to be related to its extremely rapid repassivation rate and high SFE.","abstract_html":"In order to understand the stress corrosion cracking behavior of metastable and stable austenitic stainless steels, constant elongation rate tests (CERT) and sub-critical crack growth (SCG) tests were used to measure the susceptibility and cracking rate. The tests were performed in H$\\sb2$SO$\\sb4$/NaCl solutions in the pH ranges from 0 to 7 and at temperatures from 25 to 75$\\sp\\circ$C. The AISI 301 (metastable) and AISI 310S (stable) alloys were used for these tests. In CERT, the 301 alloy showed susceptible to SCC while 310S did not. In SCG tests, SCG behavior was analysed with respect to applied potential zones on the polarization curve, i.e. cathodic, active (zone 1), active/passive (zone 2) and passive/transpassive (zone 3). It was found that hydrogen embrittlement (HE) was the main cracking process in zone 1 and cathodic zone for annealed specimens. For deformed specimens, HE was operative in the cathodic zone, but in zone 1 the behavior was not clearly HE. Film rupture and active path corrosion were found to proceed in zone 3. In zone 2, SCC seemed to proceed by a mixture of models. The HE characteristics in 301 alloy was believed to be related to the rate of accumulation of hydrogen at the crack tip. Since stain-induced <span class=\"etd-inline-math\">&alpha;\\sp\\prime</span> phase was verified on the fracture surface, <span class=\"etd-inline-math\">&alpha;\\sp\\prime</span> was considered to play an important role in the HE process. The fast diffusion rate of hydrogen in <span class=\"etd-inline-math\">&alpha;\\sp\\prime</span> phase and low escape rate of hydrogen in the surrounding <span class=\"etd-inline-math\">&gamma;</span> phase were believed to be the cause of HE. At potentials more noble than zone 1, the smaller hydrogen charging rate (HCR) was believed to be the cause of immunity to HE, resulting in predominance of dissolution or active path corrosion (APC). The HE process was found to be strengthened by hydrogen recombination poison (NaAsO$\\sb2$) in zone 1 and cathodic zone, although it was a corrosion inhibitor. For 310S alloy, 3-stage SCG behavior was observed in pH $$ 4N. A ductile failure morphology was identified for 310S alloy tested in the above solution. The resistance of 310S to SCC was thought to be related to its extremely rapid repassivation rate and high SFE.","abstract_has_math":true,"creators":["Juang, Hsun-Kai"],"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":"2011-05-07T12:30:04Z","date_published":"2011-05-07T12:30:04Z","updated_at":"2026-07-22T22:25:15Z","subjects":["Engineering, Mechanical","Engineering, Metallurgy","Engineering, Materials Science"],"languages":["eng"],"rights":["Copyright 1989 Juang, Hsun-Kai"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI9010905","AAI9010905"],"render_values":[{"text":"(UMI)AAI9010905","href":null,"code":true},{"text":"AAI9010905","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/20139","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":["Juang, Hsun-Kai"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T12:30:04Z","10000-01-01","1989"]},{"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, Mechanical","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 1989 Juang, Hsun-Kai"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI9010905","http://hdl.handle.net/2142/20139","AAI9010905"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["In order to understand the stress corrosion cracking behavior of metastable and stable austenitic stainless steels, constant elongation rate tests (CERT) and sub-critical crack growth (SCG) tests were used to measure the susceptibility and cracking rate. The tests were performed in H$\\sb2$SO$\\sb4$/NaCl solutions in the pH ranges from 0 to 7 and at temperatures from 25 to 75$\\sp\\circ$C. The AISI 301 (metastable) and AISI 310S (stable) alloys were used for these tests. In CERT, the 301 alloy showed susceptible to SCC while 310S did not. In SCG tests, SCG behavior was analysed with respect to applied potential zones on the polarization curve, i.e. cathodic, active (zone 1), active/passive (zone 2) and passive/transpassive (zone 3). It was found that hydrogen embrittlement (HE) was the main cracking process in zone 1 and cathodic zone for annealed specimens. For deformed specimens, HE was operative in the cathodic zone, but in zone 1 the behavior was not clearly HE. Film rupture and active path corrosion were found to proceed in zone 3. In zone 2, SCC seemed to proceed by a mixture of models. The HE characteristics in 301 alloy was believed to be related to the rate of accumulation of hydrogen at the crack tip. Since stain-induced $\\alpha\\sp\\prime$ phase was verified on the fracture surface, $\\alpha\\sp\\prime$ was considered to play an important role in the HE process. The fast diffusion rate of hydrogen in $\\alpha\\sp\\prime$ phase and low escape rate of hydrogen in the surrounding $\\gamma$ phase were believed to be the cause of HE. At potentials more noble than zone 1, the smaller hydrogen charging rate (HCR) was believed to be the cause of immunity to HE, resulting in predominance of dissolution or active path corrosion (APC). The HE process was found to be strengthened by hydrogen recombination poison (NaAsO$\\sb2$) in zone 1 and cathodic zone, although it was a corrosion inhibitor. For 310S alloy, 3-stage SCG behavior was observed in pH $$ 4N. A ductile failure morphology was identified for 310S alloy tested in the above solution. The resistance of 310S to SCC was thought to be related to its extremely rapid repassivation rate and high SFE.","Made available in DSpace on 2011-05-07T12:30:04Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9010905.pdf: 6133170 bytes, checksum: 875e99516d849be7b269f59d2be1ec28 (MD5) Previous issue date: 1989","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:41:49Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:18:09-05:00 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":["Stress corrosion cracking of austenitic stainless steels"]}]}],"canonical_facts":{"dc:contributor":["Altstetter, Carl J."],"dc:creator":["Juang, Hsun-Kai"],"dc:date":["2011-05-07T12:30:04Z","10000-01-01","1989"],"dc:description":["In order to understand the stress corrosion cracking behavior of metastable and stable austenitic stainless steels, constant elongation rate tests (CERT) and sub-critical crack growth (SCG) tests were used to measure the susceptibility and cracking rate. The tests were performed in H$\\sb2$SO$\\sb4$/NaCl solutions in the pH ranges from 0 to 7 and at temperatures from 25 to 75$\\sp\\circ$C. The AISI 301 (metastable) and AISI 310S (stable) alloys were used for these tests. In CERT, the 301 alloy showed susceptible to SCC while 310S did not. In SCG tests, SCG behavior was analysed with respect to applied potential zones on the polarization curve, i.e. cathodic, active (zone 1), active/passive (zone 2) and passive/transpassive (zone 3). It was found that hydrogen embrittlement (HE) was the main cracking process in zone 1 and cathodic zone for annealed specimens. For deformed specimens, HE was operative in the cathodic zone, but in zone 1 the behavior was not clearly HE. Film rupture and active path corrosion were found to proceed in zone 3. In zone 2, SCC seemed to proceed by a mixture of models. The HE characteristics in 301 alloy was believed to be related to the rate of accumulation of hydrogen at the crack tip. Since stain-induced $\\alpha\\sp\\prime$ phase was verified on the fracture surface, $\\alpha\\sp\\prime$ was considered to play an important role in the HE process. The fast diffusion rate of hydrogen in $\\alpha\\sp\\prime$ phase and low escape rate of hydrogen in the surrounding $\\gamma$ phase were believed to be the cause of HE. At potentials more noble than zone 1, the smaller hydrogen charging rate (HCR) was believed to be the cause of immunity to HE, resulting in predominance of dissolution or active path corrosion (APC). The HE process was found to be strengthened by hydrogen recombination poison (NaAsO$\\sb2$) in zone 1 and cathodic zone, although it was a corrosion inhibitor. For 310S alloy, 3-stage SCG behavior was observed in pH $$ 4N. A ductile failure morphology was identified for 310S alloy tested in the above solution. The resistance of 310S to SCC was thought to be related to its extremely rapid repassivation rate and high SFE.","Made available in DSpace on 2011-05-07T12:30:04Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9010905.pdf: 6133170 bytes, checksum: 875e99516d849be7b269f59d2be1ec28 (MD5) Previous issue date: 1989","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:41:49Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:18:09-05:00 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":["(UMI)AAI9010905","http://hdl.handle.net/2142/20139","AAI9010905"],"dc:language":["eng"],"dc:rights":["Copyright 1989 Juang, Hsun-Kai"],"dc:subject":["Engineering, Mechanical","Engineering, Metallurgy","Engineering, Materials Science"],"dc:title":["Stress corrosion cracking of austenitic stainless steels"],"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"}