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Alloy softening in binary iron solid solutionsAn experimental study was conducted to determine whether alloy softening in Fe alloys is dependent on electron concentration and to provide a direct comparison of alloy softening and hardening in several binary Fe alloy systems having the same processing history. Alloy additions to Fe included the elements in the Periods 4-6 and the Groups IV-VIII with the exception of technetium. A total of 19 alloy systems was investigated, and hardness testing was the primary means of evaluation. Testing was carried out at four temperatures over a homologous temperature range of 0.043-0.227 times the absolute melting temperature of unalloyed Fe. Major conclusions are that the atomic radius ratio of solute-to-Fe is the key factor in controlling low-temperature hardness of the binary Fe alloys and that alloy softening rates at 77 K and alloy hardening rates at 411 K are correlated with this atomic radius ratio for 15 of the binary alloy systems. Mechanisms of alloy softening and hardening are proposed.
Document ID
19760058704
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Stephens, J. R.
(NASA Lewis Research Center Cleveland, OH, United States)
Witzke, W. R.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
August 1, 1976
Publication Information
Publication: Journal of the Less-Common Metals
Volume: 48
Subject Category
Metallic Materials
Accession Number
76A41670
Distribution Limits
Public
Copyright
Other

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