Volume 10, Issue 2 (June 2013)                   IJMSE 2013, 10(2): 19-28 | Back to browse issues page

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H. R. Jafarian, E. Borhani. EFFECT OF AUSTENITE GRAIN MORPHOLOGY ON VARIANT SELECTION OF MARTENSITE TRANSFORMED FROM ULTRAFINE-GRAINED AUSTENITE. IJMSE 2013; 10 (2) :19-28
URL: http://ijmse.iust.ac.ir/article-1-559-en.html
EFFECT OF AUSTENITE GRAIN MORPHOLOGY ON VARIANT SELECTION OF MARTENSITE TRANSFORMED FROM ULTRAFINE-GRAINED AUSTENITE
H. R. Jafarian , E. Borhani
Abstract:   (17761 Views)
In this research, variant selection of martensite transformed from ultrafine-grained (UFG) austenite fabricated by accumulative roll bonding (ARB) process and subsequent annealing was investigated with respect tomorphology of parentaustenitic phase. The results show that the original shape of austenite grain is very effective factor in determiningthe preferred variants of martensite transformed from the elongated ultrafine-grained austenite fabricated by 6-cycles via the ARB process. Annealing treatment of the austenitic samples subjected to the 6-cycle ARB processed at 873 K for 1.8 ks suppressed the variant selection by changing the morphology of austenite grains from elongated ultrafine-grains to fully-recrystallized and equiaxed fine-grains
Keywords: Martensitic transformation, Accumulative roll bonding, Ultrafine-grained austenite, Variant selection
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Type of Study: Research Paper |
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