Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1573954 | Materials Science and Engineering: A | 2015 | 7 Pages |
Abstract
The deformation mechanisms of the metastable austenite phase of a transformation induced plasticity (TRIP) stainless steel, AISI 301LN, have been investigated by compression of multicrystalline micropillars of different crystallographic orientations, with particular attention on the strain-induced phase transformation from austenite to martensite. Intergranular shearing and twinning were observed to be the primary deformation mechanisms, with a predominant ã122ã orientation developed in the austenitic phase, combined with limited planar slip within single grains of austenite. The phase transformation from austenite to ε and αâ²-martensite was clearly observed adjacent to the sheared regions using TEM-EBSD techniques. The ε-martensite phase was found to be preferentially located in the regions near the grain boundaries which experienced higher shear stresses during compression.
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Authors
J.J. Roa, J.M. Wheeler, T. Trifonov, G. Fargas, A. Mateo, J. Michler, E. Jiménez-Piqué,