{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/68652"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/68652","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Fracture Kinetics of Hydrogen Embrittled Niobium","abstract":"Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981.","abstract_html":"Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981.","abstract_has_math":false,"creators":["Hindin, Barry Scott"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Metallurgical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-14T16:00:46Z","date_published":"2014-12-14T16:00:46Z","updated_at":"2026-07-22T22:25:59Z","subjects":["Engineering, Metallurgy"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8127607"],"render_values":[{"text":"(UMI)AAI8127607","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/68652","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Hindin, Barry Scott"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-14T16:00:46Z","10000-01-01","1981"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Metallurgical 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"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8127607","http://hdl.handle.net/2142/68652"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981.","Kinetics of crack propagation in hydrogen charged niobium were studied in the temperature range 77 to 303 K and for hydrogen concentrations between 0.068 and 3.2 at.%. Crack velocities between 10('-8) and 10('-2) m/s were determined as a function of the Mode I stress intensity factors using single edge notch and double torsion specimens. Validity of the double torsion technique was established using a variety of methods including photoelastic analysis of the stresses in the plane normal to the specimen's crack surface.","Increasing, decreasing and constant K(,I) tests were carried out and the 1nV versus K(,I) data exhibited various behavior depending upon the type of loading. Linking up of fracturing hydrides were shown to be responsible for a unique three region (V-K) behavior which occurred only at intermediate temperatures for decreasing K(,I) tests. Analysis of the temperature dependence for Stage II during constant K(,I) tests indicated that the cracking kinetics are controlled by hydrogen diffusion to the crack tip. Differences between crack velocities in deuterium and hydrogen charged specimens were consistent with the isotopic differences in their diffusion coefficients. Fracture surfaces of the test specimens were examined and shown to exhibit features consistent with their crack velocity behavior.","Made available in DSpace on 2014-12-14T16:00:46Z (GMT). No. of bitstreams: 1 8127607.pdf: 4316117 bytes, checksum: 77e63e66cc601e9685830d20ccb05a6d (MD5) Previous issue date: 1981","Embargo set by: Seth Robbins for item 68830 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","175 p."]},{"key":"dc:title","label":"Title","values":["Fracture Kinetics of Hydrogen Embrittled Niobium"]}]}],"canonical_facts":{"dc:creator":["Hindin, Barry Scott"],"dc:date":["2014-12-14T16:00:46Z","10000-01-01","1981"],"dc:description":["Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981.","Kinetics of crack propagation in hydrogen charged niobium were studied in the temperature range 77 to 303 K and for hydrogen concentrations between 0.068 and 3.2 at.%. Crack velocities between 10('-8) and 10('-2) m/s were determined as a function of the Mode I stress intensity factors using single edge notch and double torsion specimens. Validity of the double torsion technique was established using a variety of methods including photoelastic analysis of the stresses in the plane normal to the specimen's crack surface.","Increasing, decreasing and constant K(,I) tests were carried out and the 1nV versus K(,I) data exhibited various behavior depending upon the type of loading. Linking up of fracturing hydrides were shown to be responsible for a unique three region (V-K) behavior which occurred only at intermediate temperatures for decreasing K(,I) tests. Analysis of the temperature dependence for Stage II during constant K(,I) tests indicated that the cracking kinetics are controlled by hydrogen diffusion to the crack tip. Differences between crack velocities in deuterium and hydrogen charged specimens were consistent with the isotopic differences in their diffusion coefficients. Fracture surfaces of the test specimens were examined and shown to exhibit features consistent with their crack velocity behavior.","Made available in DSpace on 2014-12-14T16:00:46Z (GMT). No. of bitstreams: 1 8127607.pdf: 4316117 bytes, checksum: 77e63e66cc601e9685830d20ccb05a6d (MD5) Previous issue date: 1981","Embargo set by: Seth Robbins for item 68830 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","175 p."],"dc:identifier":["(UMI)AAI8127607","http://hdl.handle.net/2142/68652"],"dc:language":["eng"],"dc:subject":["Engineering, Metallurgy"],"dc:title":["Fracture Kinetics of Hydrogen Embrittled Niobium"],"dc:type":["text"],"thesis:degree_discipline":["Metallurgical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:59Z"}