Effect of double vacuum melting and retained austenite on rolling-element fatigue life of AMS 5749 bearing steel

Author:: Parker, R. J.
Published:: Oct 1, 1977.
Physical Description:: 1 electronic document
Additional Creators:: Hodder, R. S.

Online Version

hdl.handle.net , Connect to this object online.

Availability

Finding items...

Restrictions on Access:

Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access

Summary:

AMS 5749 steel combines the tempering, hot hardness, and hardness retention characteristics of AISI M-50 steel with the corrosion and oxidation resistance of AISI 440C stainless steel. The five-ball fatigue tester was used to evaluate the rolling-element fatigue life of AMS 5749. Double vacuum melting (vacuum induction melting plus vacuum arc remelting, VIM-VAR) produced AMS 5749 material with a rolling-element fatigue life at least 14 times that of vacuum induction melting alone. The VIM-VAR AMS 5749 steel balls gave lives from 6 to 12 times greater than VIM-VAR AISI M-50 steel balls. The highest level of retained austenite, 14.6 percent, was significantly detrimental to rolling-element fatigue life relative to the intermediate level of 11.1 percent.

Other Subject(s):

MECHANICAL ENGINEERING

Collection:

NASA Technical Reports Server (NTRS) Collection.

Note:

Document ID: 19770026576.
Accession ID: 77N33520.
E-9101.
NASA-TP-1060.

Terms of Use and Reproduction:

No Copyright.

View MARC record | catkey: 15731041