Paper Title:
Mechanical Properties of Ultra-Fine Grained Fe-Cr-Ni Alloy Fabricated by ARB
  Abstract

Microstructures and mechanical properties of Fe-15wt.%Cr-10wt.%Ni alloy ARB processed by various cycles were studied. The starting material showed lath martensite structure. However, the austenitic phase became stable by the high straining (ARB) above Af temperature. The volume fraction of austenitic phase greatly increased to around 90 % by 2 ARB cycles and nearly saturated at about 95 % after higher ARB cycles. The grain refinement progressed during the ARB, which leaded to the formation of ultrafine lamellar UFG austenitic microstructure with mean lamellar spacing of about 300 nm. The UFG Fe-Cr-Ni alloy performed both high strength and large elongation. Especially, the yield strength of the alloy ARB processed by 5 cycles reached to 900 MPa, and the total elongation was 40 %. The good ductility of the present specimens was attributed to the occurrence of transformation-induced plasticity (TRIP).

  Info
Periodical
Advanced Materials Research (Volumes 26-28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
413-416
DOI
10.4028/www.scientific.net/AMR.26-28.413
Citation
T. Maekawa, H. Kitahara , N. Tsuji, "Mechanical Properties of Ultra-Fine Grained Fe-Cr-Ni Alloy Fabricated by ARB ", Advanced Materials Research, Vols. 26-28, pp. 413-416, 2007
Online since
October 2007
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Price
$32.00
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