Relationship between stress-induced martensitic transformation and impact toughness in low carbon austenitic steels

Zhang, MX and Kelly, PM (2002) Relationship between stress-induced martensitic transformation and impact toughness in low carbon austenitic steels. Journal of Materials Science, 37 17: 3603-3613. doi:10.1023/A:1016544821646


Author Zhang, MX
Kelly, PM
Title Relationship between stress-induced martensitic transformation and impact toughness in low carbon austenitic steels
Journal name Journal of Materials Science   Check publisher's open access policy
ISSN 0022-2461
Publication date 2002-01-01
Sub-type Article (original research)
DOI 10.1023/A:1016544821646
Volume 37
Issue 17
Start page 3603
End page 3613
Total pages 11
Place of publication US
Publisher Kluwer Academic/Plenum Publishers
Language eng
Subject C1
291302 Physical Metallurgy
680305 Metals (composites, coatings, bonding, etc.)
291403 Alloy Materials
Abstract The effect of test temperature, which controls the stability of austenite, on the impact toughness of a low carbon Fe-Ni-Mn-C austenitic steel and 304 stainless steel, has been investigated. Under impact conditions, stress-induced martensitic transformation occurred, in a region near the fracture surface, at test temperatures below 80degreesC for the Fe-Ni-Mn-C steel and below -25degreesC for 304 stainless steel. The former shows significant transformation toughening and the highest impact toughness was obtained at 10degreesC, which corresponds to the maximum amount of martensite formed by stress-induced transformation above the Ms temperature. The stress-induced martensitic transformation contributes negatively to the impact toughness in the 304 stainless steel. Increasing the amount of stress-induced transformation to martensite, lowered the impact toughness. The experimental results can be well explained by the Antolovich theory through the analysis of metallography and fractography. The different effect of stress-induced transformation on the impact toughness in Fe-Ni-Mn-C steel and 304 stainless steel has been further understood by applying the crystallographic model for stress-induced martensitic transformation to these two steels. (C) 2002 Kluwer Academic Publishers.
Keyword Materials Science, Multidisciplinary
Shear Stresses
Plasticity
Model
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Mechanical & Mining Engineering Publications
 
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Created: Wed, 15 Aug 2007, 04:11:35 EST