{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/71840"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/71840","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A Study of Reduced Chromium Content in A Nickel-Base Superalloy via Element Substitution and Rapid Solidification Processing","abstract":"A study of reduced chromium content in a nickel-base superalloy via element substitution and rapid solidification processing was performed. The base alloy studied was a commercial nickel-based superalloy, 713LC, which was developed by the INCO family of companies. The two elements used as partial substitutes for chromium were Si and Zr.","abstract_html":"A study of reduced chromium content in a nickel-base superalloy via element substitution and rapid solidification processing was performed. The base alloy studied was a commercial nickel-based superalloy, 713LC, which was developed by the INCO family of companies. The two elements used as partial substitutes for chromium were Si and Zr.","abstract_has_math":false,"creators":["Powers, William Owen"],"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":"2014-12-16T20:52:11Z","date_published":"2014-12-16T20:52:11Z","updated_at":"2026-07-22T22:26:05Z","subjects":["Engineering, Metallurgy"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8711854"],"render_values":[{"text":"(UMI)AAI8711854","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/71840","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Powers, William Owen"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-16T20:52:11Z","10000-01-01","1987"]},{"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":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/71840","(UMI)AAI8711854"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A study of reduced chromium content in a nickel-base superalloy via element substitution and rapid solidification processing was performed. The base alloy studied was a commercial nickel-based superalloy, 713LC, which was developed by the INCO family of companies. The two elements used as partial substitutes for chromium were Si and Zr.","The microstructure of conventionally solidified materials (713LC, 713LC + 1.0 Si, 713LC + 1.0 Zr, 713LC - 1/2 Cr + 1.0 Si, and 713LC - 1/2 Cr + 1.0 Zr (wt.%)) was characterized using light optical microscopy (LOM), scanning electron microscopy (SEM), and analytical electron microscopy (AEM). These alloys were rapidly solidified using the chill block melt spinning technique and the rapidly solidified microstructures were characterized using AEM. The thermal stability of the rapidly solidified microstructures was assessed following heat treatments at 1033 K and 1273 K.","Rapidly solidified material of three of the alloys (713LC, 713LC - 1/2 Cr + 1.0 Si, and 713LC - 1/2 Cr + 1.0 Zr) was reduced to particulate form and consolidated using hot isostatic pressing (HIP). The consolidated materials were also characterized using LOM, SEM, and AEM. In order to evaluate the relative strengths of the consolidated alloys, compression tests were performed at room temperature and 1033 K on samples of as-HIP'ed, and HIP'ed plus solution treated material. The yield strengths of the alloys 713LC and 713LC - 1/2 Cr + 1.0 Zr were similar; however, the yield strengths of the alloy 713LC - 1/2 Cr + 1.0 Si were significantly lower in comparison with the other two alloys. This was primarily attributed to either larger grain sizes, higher porosity levels, or larger amounts of prior ribbon boundary precipitation in the HIPs of the alloy 713LC - 1/2 Cr + 1.0 Si, or a combination of these factors.","The oxidation resistance of the HIP'ed materials, as well as some conventionally solidified materials, was investigated using isothermal and cyclic tests at 1373 K. In general, the oxidation resistance of the alloys 713LC and 713LC - 1/2 Cr + 1.0 Si were similar. However, the oxidation resistance of the alloy 173LC - 1/2 Cr + 1.0 Zr was significantly worse in comparison with the other materials. The oxidation mechanisms leading to the variation in oxidation resistance of the materials were not explicitly determined in this study.","Made available in DSpace on 2014-12-16T20:52:11Z (GMT). No. of bitstreams: 1 8711854.pdf: 10611098 bytes, checksum: 92918017331ece53a85151a0338cdfc5 (MD5) Previous issue date: 1987","Embargo set by: Seth Robbins for item 72006 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","292 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987."]},{"key":"dc:title","label":"Title","values":["A Study of Reduced Chromium Content in A Nickel-Base Superalloy via Element Substitution and Rapid Solidification Processing"]}]}],"canonical_facts":{"dc:creator":["Powers, William Owen"],"dc:date":["2014-12-16T20:52:11Z","10000-01-01","1987"],"dc:description":["A study of reduced chromium content in a nickel-base superalloy via element substitution and rapid solidification processing was performed. The base alloy studied was a commercial nickel-based superalloy, 713LC, which was developed by the INCO family of companies. The two elements used as partial substitutes for chromium were Si and Zr.","The microstructure of conventionally solidified materials (713LC, 713LC + 1.0 Si, 713LC + 1.0 Zr, 713LC - 1/2 Cr + 1.0 Si, and 713LC - 1/2 Cr + 1.0 Zr (wt.%)) was characterized using light optical microscopy (LOM), scanning electron microscopy (SEM), and analytical electron microscopy (AEM). These alloys were rapidly solidified using the chill block melt spinning technique and the rapidly solidified microstructures were characterized using AEM. The thermal stability of the rapidly solidified microstructures was assessed following heat treatments at 1033 K and 1273 K.","Rapidly solidified material of three of the alloys (713LC, 713LC - 1/2 Cr + 1.0 Si, and 713LC - 1/2 Cr + 1.0 Zr) was reduced to particulate form and consolidated using hot isostatic pressing (HIP). The consolidated materials were also characterized using LOM, SEM, and AEM. In order to evaluate the relative strengths of the consolidated alloys, compression tests were performed at room temperature and 1033 K on samples of as-HIP'ed, and HIP'ed plus solution treated material. The yield strengths of the alloys 713LC and 713LC - 1/2 Cr + 1.0 Zr were similar; however, the yield strengths of the alloy 713LC - 1/2 Cr + 1.0 Si were significantly lower in comparison with the other two alloys. This was primarily attributed to either larger grain sizes, higher porosity levels, or larger amounts of prior ribbon boundary precipitation in the HIPs of the alloy 713LC - 1/2 Cr + 1.0 Si, or a combination of these factors.","The oxidation resistance of the HIP'ed materials, as well as some conventionally solidified materials, was investigated using isothermal and cyclic tests at 1373 K. In general, the oxidation resistance of the alloys 713LC and 713LC - 1/2 Cr + 1.0 Si were similar. However, the oxidation resistance of the alloy 173LC - 1/2 Cr + 1.0 Zr was significantly worse in comparison with the other materials. The oxidation mechanisms leading to the variation in oxidation resistance of the materials were not explicitly determined in this study.","Made available in DSpace on 2014-12-16T20:52:11Z (GMT). No. of bitstreams: 1 8711854.pdf: 10611098 bytes, checksum: 92918017331ece53a85151a0338cdfc5 (MD5) Previous issue date: 1987","Embargo set by: Seth Robbins for item 72006 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","292 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987."],"dc:identifier":["http://hdl.handle.net/2142/71840","(UMI)AAI8711854"],"dc:subject":["Engineering, Metallurgy"],"dc:title":["A Study of Reduced Chromium Content in A Nickel-Base Superalloy via Element Substitution and Rapid Solidification Processing"],"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":"2026-07-22T22:26:05Z"}