Deformation of polycrystalline TRIP stainless steel micropillars
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 p...
| Authors: | , , , , , , |
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| Format: | article |
| Publication Date: | 2015 |
| Country: | España |
| Institution: | Universitat Politècnica de Catalunya (UPC) |
| Repository: | UPCommons. Portal del coneixement obert de la UPC |
| Language: | English |
| OAI Identifier: | oai:upcommons.upc.edu:2117/80309 |
| Online Access: | https://hdl.handle.net/2117/80309 https://dx.doi.org/10.1016/j.msea.2015.08.082 |
| Access Level: | Open access |
| Keyword: | Stainless steel Transformation induced plasticity microcompression micro-pillar in-situ deformation shear events mechanical twinning. Acer inoxidable austenític -- Propietats mecàniques Àrees temàtiques de la UPC::Enginyeria dels materials |
| Summary: | 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 <122> orientation developed in the austenitic phase, combined with limited planar slip within single grains of austenite. The phase transformation from austenite to ¿ and ¿’-martensite was clearly observed adjacent to the sheared regions using TEM-EBSD techniques. The ¿-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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