Dynamic anisotropic grain growth during superplasticity in Al–Mg–Mn alloy

DOI Web Site Web Site 被引用文献2件 参考文献25件

書誌事項

公開日
2018-05
資源種別
journal article
権利情報
  • https://www.elsevier.com/tdm/userlicense/1.0/
  • https://www.elsevier.com/legal/tdmrep-license
  • http://www.elsevier.com/open-access/userlicense/1.0/
DOI
  • 10.1016/j.scriptamat.2018.02.021
公開者
Elsevier BV

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説明

Abstract The microstructural mechanisms of dynamic anisotropic grain growth during superplasticity in a quasi-single phase Al–Mg–Mn alloy were characterized. The tensile superplasticity with 320% elongation was mediated by grain boundary sliding accompanied by rigid grain rotation with a limited crystallographic slip. The deformed sample exhibited a bimodal microstructure. Some grains maintained their original size and equiaxed morphology during superplasticity, whereas the others became elongated more than twice in aspect ratio and were composed of equiaxed subgrains that were aligned in the tensile axis. These microstructural features were possibly attributed to a rotation-coupled grain coalescence accompanied by grain boundary sliding.

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