Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 49A, Issue 6, Pages 2257-2268Publisher
SPRINGER
DOI: 10.1007/s11661-018-4589-0
Keywords
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Funding
- National Natural Science Foundation of China [50871055, 51474132]
- Fundamental Research Funds for the Central Universities [30917014106]
- PAPD
- Jiangsu Key Lab of Micro-Nano Materials and Technology
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In this study, the effects of deformation mode (rolling and tension) and strain level on grain boundary character distribution were systematically investigated in 304 austenitic stainless steel. The experimental results showed that the < 110 > component parallel to the normal direction orientation and the P(B-ND) {110} < 111 > texture were predominant in the rolled specimens and the tensioned ones, respectively. For each mode of deformation, the fraction of low-Sigma coincidence site lattice (CSL) boundaries, especially Sigma 3(n) (n = 1, 2, 3) boundaries decreased with the increasing strain level after annealing. At a lower strain level, the type of texture played a leading role in grain boundary reconstruction during annealing, and the < 110 > component parallel to the normal direction orientation facilitated the formation of low-Sigma CSL boundaries during annealing compared with the P(B-ND) texture. However, for a higher strain level, the stored energy became dominant in grain boundary reconstruction during annealing, and a large stored energy was detrimental to the formation of low-Sigma CSL boundaries, which resulted in a higher fraction of low-Sigma CSL boundaries in the tensioned specimen than that in the rolled one after annealing. (C) The Minerals, Metals & Materials Society and ASM International 2018.
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