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<p>A novel processing technique, designated as the cross hot rolling–shearing–bending and subsequent annealing (CHRSBA), was proposed to effectively eliminate the basal texture and significantly enhance the room-temperature formability of AZ31 Mg alloy sheets. Following CHRSB deformation, the microstructure exhibited a high density of dislocations and numerous extension twins. A new texture is also developed, composed of a dominant TD-texture component, with basal pole density peaks aligned with the TD, and an RD-split texture component, with basal pole density peaks tilted about 40° from the ND toward the RD. Subsequent recrystallization annealing successfully eliminated the twins and dislocations of the CHRSB sheet, resulting in a homogeneous microstructure of equiaxed grains. Notably, an unusual annular non-basal texture was developed in the CHRSBA sheet, characterized by basal poles uniformly distributed within a broad annular region tilted between approximately 20° and 70° from the ND. This annular texture endowed the AZ31 sheet with exceptional room-temperature stretch formability, achieving a high Erichsen value of ~ 8.0&#xa0;mm and markedly low planar anisotropy.</p>

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Achieving Texture Modification and Enhanced Formability in AZ31 Magnesium Alloy via Novel CHRSB-Annealing Process

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Laixin Shi,
  • Zheng Wang,
  • Tao Zhou

摘要

A novel processing technique, designated as the cross hot rolling–shearing–bending and subsequent annealing (CHRSBA), was proposed to effectively eliminate the basal texture and significantly enhance the room-temperature formability of AZ31 Mg alloy sheets. Following CHRSB deformation, the microstructure exhibited a high density of dislocations and numerous extension twins. A new texture is also developed, composed of a dominant TD-texture component, with basal pole density peaks aligned with the TD, and an RD-split texture component, with basal pole density peaks tilted about 40° from the ND toward the RD. Subsequent recrystallization annealing successfully eliminated the twins and dislocations of the CHRSB sheet, resulting in a homogeneous microstructure of equiaxed grains. Notably, an unusual annular non-basal texture was developed in the CHRSBA sheet, characterized by basal poles uniformly distributed within a broad annular region tilted between approximately 20° and 70° from the ND. This annular texture endowed the AZ31 sheet with exceptional room-temperature stretch formability, achieving a high Erichsen value of ~ 8.0 mm and markedly low planar anisotropy.