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Record Details

Record 95 of 2519
Conditions Of Directional Solidification Affect Superalloy
Author and Affiliation:
Schmidt, D. D.(NASA Marshall Space Flight Center, Huntsville, AL.)
Alter, W. S.(NASA Marshall Space Flight Center, Huntsville, AL.)
Hamilton, W. D.(NASA Marshall Space Flight Center, Huntsville, AL.)
Parr, R. A.(NASA Marshall Space Flight Center, Huntsville, AL.)
Abstract: Report describes experiments to determine effects of gradient of temperature and rate of solidification on microstructure and fatigue properties of nickel-based superalloy MAR-M246(Hf). Enhancement of properties extends lifespans of objects, including turbo-pump blades of Space Shuttle Main Engines. Results indicate significant improvements in fatigue properties derived through manipulation of parameters of directional solidification. Particularly MAR-M246(Hf) for turbine blades contains small, well-dispersed blocky carbide and microstructure with small distances between dendrite arms, and without eutectic phase.
Publication Date: Nov 01, 1992
Document ID:
19920000693
(Acquired Nov 04, 1995)
Accession Number: 92B10693
Subject Category: MATERIALS
Report/Patent Number: MFS-27231
Document Type: NASA Tech Brief
Publication Information: NASA Tech Briefs (ISSN 0145-319X); 16; 11; P. 88; (SEE N89-29528/TB)"The Eff)
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: DIRECTIONAL SOLIDIFICATION (CRYSTALS); HEAT RESISTANT ALLOYS; NICKEL ALLOYS
Availability Source: National Technology Transfer Center (NTTC), Wheeling, WV
Availability Notes: Additional information available through: National Technology Transfer Center (NTTC), Wheeling, WV 26003, (Tel: 1-800-678-6882).
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