Acoustic Emission from Ferrous Martensites,

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Abstract:

Acoustic Emission during Martensitic transformation of two Fe-Ni-C alloys 31.4 Ni-0.03C and 22 Ni-0.44 C has been investigated as a function of their thermo-mechanical history. Starting conditions examined include a as annealed equiaxed austenite gamma b 20, 50 and 80 rolling of a at room temperature, c transformed to martensite alpha prime and then rapidly reverted to gamma, d reverted gamma from 20, 50 and 80 deformed alpha prime e reverted gamma after 5 thermal cyclings with or without prior deformation. Acoustic emission total counts were monitored as a function of temperature Modified author abstract

Author(s):
Ono, Kanji ; Schlotthauer, T. C. ; Koppenaal, T. J.
Author Organization(s):
CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE
Supplementary Note:
Prepared in cooperation with Philco-Ford Corp., Newport Beach, Calif. Advanced Development Operation. Presented at the Symposium on Non-Destructive Evaluation (9th) San Antonio, Tex., 25-27 Apr 73. Sponsored as part by Army Materials and Mechanics Research Center, Watertown, Mass.
Pagination:
0020

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
UCLA-ENG-7334
Contract/Grant Number(s):
N00014-69-A-0200-4031
Project Number(s):
NR-386-700
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*MARTENSITE, ACOUSTICS), AUSTENITE, MICROSTRUCTURE, ACOUSTIC PROPERTIES, ANNEALING, DEFORMATION, METALLOGRAPHY
Field(s)/Group(s):
Properties of Metals and Alloys
Keyword(s):
ACOUSTIC EMISSIONS, TRIP STEEL
Report Date:
1973 May 01