NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Hardness and Microstructure of Binary and Ternary Nitinol CompoundsThe hardness and microstructure of twenty-six binary and ternary Nitinol (nickel titanium, nickel titanium hafnium, nickel titanium zirconium and nickel titanium tantalum) compounds were studied. A small (50g) ingot of each compound was produced by vacuum arc remelting. Each ingot was homogenized in vacuum for 48 hr followed by furnace cooling. Specimens from the ingots were then heat treated at 800, 900, 1000 or 1100 degree C for 2 hr followed by water quenching. The hardness and microstructure of each specimen was compared to the baseline material (55-Nitinol, 55 at.% nickel - 45 at.% titanium, after heat treatment at 900 degC). The results show that eleven of the studied compounds had higher hardness values than the baseline material. Moreover, twelve of the studied compounds had measured hardness values greater 600HV at heat treatments from 800 to 900 degree C.
Document ID
20160001689
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Stanford, Malcolm K. (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
February 9, 2016
Publication Date
January 1, 2016
Subject Category
Astronautics (General)
Metals And Metallic Materials
Report/Patent Number
NASA/TM-2016-218946
GRC-E-DAA-TN27159
E-19191
Funding Number(s)
WBS: WBS 109492.02.03.02.01.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
intermetallics
photomicrography
Vickers hardness
metallography

Related Records

IDRelationTitle20200000255SupersedesHardness and Microstructure of Binary and Ternary Nitinol Compounds
No Preview Available