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<p>This study examined the tensile behavior of an AZ61 Mg alloy processed by severe plastic deformation through high-pressure torsion. Tensile testing at room temperature yielded the tensile strength (0.2% proof stress) as high as 440&#xa0;MPa (420&#xa0;MPa) with the total elongation of ~ 11%. After confirming that the specimen exhibited superplasticity at 473&#xa0;K to the total elongation of ~ 870%, tensile testing at room temperature was also conducted on the specimen pre-deformed to 200% to reach the tensile strength (0.2% proof stress) of 320&#xa0;MPa (280&#xa0;MPa) with total elongation of ~ 8%. It is anticipated that the formability of the HPT-processed sample can be realized by the superplasticity and the successive room-temperature tensile strength (0.2% proof stress) remains high with good ductility even after the pre-deformation by superplasticity.</p>

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Ultrafine-grained magnesium alloy for high strength with formability

  • 期刊论文

  • 发表日期：

    2026年7月18日

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  • Yongpeng Tang,
  • Takahiro Masuda,
  • Shinichi Inoue,
  • Zenji Horita

摘要

This study examined the tensile behavior of an AZ61 Mg alloy processed by severe plastic deformation through high-pressure torsion. Tensile testing at room temperature yielded the tensile strength (0.2% proof stress) as high as 440 MPa (420 MPa) with the total elongation of ~ 11%. After confirming that the specimen exhibited superplasticity at 473 K to the total elongation of ~ 870%, tensile testing at room temperature was also conducted on the specimen pre-deformed to 200% to reach the tensile strength (0.2% proof stress) of 320 MPa (280 MPa) with total elongation of ~ 8%. It is anticipated that the formability of the HPT-processed sample can be realized by the superplasticity and the successive room-temperature tensile strength (0.2% proof stress) remains high with good ductility even after the pre-deformation by superplasticity.