Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5456637 | Materials Science and Engineering: A | 2017 | 7 Pages |
Abstract
Tensile behavior of a 329LA lean duplex stainless steel at room temperature is investigated after annealing at different temperatures. The austenite composition and thereby, its stability depend on the annealing temperature. For recrystallized alloys, austenite stability increases with the annealing temperature. Therefore, martensitic transformation is effectively suppressed during cooling and deformation, which results in low tensile strength and strain hardening rate, when the steel is annealed at higher temperature. Accordingly, transformation-induced plasticity is more pronounced in alloys annealed at lower temperature. During deformation, αâ²-martensite forms with a blocky morphology with the absence of the deformation bands indexed as an hcp phase. Thus, it is suggested that austenite directly transforms to αâ²-martensite during deformation rather than via the deformation bands due to a relatively high driving force for αâ²-martensite transformation in the present alloy.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Nithi Saenarjhan, Jee-Hyun Kang, Soo Chan Lee, Sung-Joon Kim,