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Record 60 of 7608
A study of reduced chromium content in a nickel-base superalloy via element substitution and rapid solidification processing. Ph.D. ThesisFinal Report
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Author and Affiliation:
Powers, William O.(Illinois Univ., Urbana-Champaign, IL, United States)
Abstract: A study of reduced chromium content in a nickel base superalloy via element substitution and rapid solidification processing was performed. The two elements used as partial substitutes for chromium were Si and Zr. The microstructure of conventionally solidified materials was characterized using microscopy techniques. These alloys were rapidly solidified using the chill block melt spinning technique and the rapidly solidified microstructures were characterized using electron microscopy. The spinning technique and the rapidly solidified microstructures was assessed following heat treatments at 1033 and 1272 K. Rapidly solidified material of three alloys was reduced to particulate form and consolidated using hot isostatic pressing (HIP). The consolidated materials were also characterized using microscopy techniques. 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-HIPed and HIPed plus solution treated material. Yield strength, porosity, and oxidation resistance characteristics are given and compared.
Publication Date: May 01, 1987
Document ID:
19870016023
(Acquired Nov 04, 1995)
Accession Number: 87N25456
Subject Category: METALLIC MATERIALS
Report/Patent Number: NASA-CR-179631, NAS 1.26:179631
Document Type: Thesis
Publisher Information: United States
Contract/Grant/Task Num: NAG3-325; RTOP 505-63-01
Financial Sponsor: NASA; United States
Organization Source: Illinois Univ.; Urbana-Champaign, IL, United States
Description: 288p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: CHROMIUM; HEAT RESISTANT ALLOYS; MICROSTRUCTURE; NICKEL ALLOYS; OXIDATION; RAPID QUENCHING (METALLURGY); SOLIDIFICATION; CHEMICAL COMPOSITION; COMPRESSIVE STRENGTH; SILICON; THERMAL STABILITY; ZIRCONIUM
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