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<p>This paper investigated the effects of variable gauge rolling (VGR), solution treatment, pre-aging, natural aging and bake-hardening on the microstructure and mechanical properties in tailor rolled blanks of aluminum-alloy (Al-TRB). By optimizing the preparation process, the 6000-series Al-TRB with variable thickness, improved bake-hardening response and excellent comprehensive mechanical properties was prepared, characterized by minimal mechanical property differences between the thin and thick zones. The T4P + BH-state Al-TRB shows optimal properties, with 197 and 201&#xa0;MPa yield strengths, 303 and 295&#xa0;MPa tensile strengths, 27.6 and 29.4% elongations, and 97 and 106&#xa0;MPa BH values for the thin and thick zones, with minimal differences of 8&#xa0;MPa in tensile strength, 4&#xa0;MPa in yield strength, and 2.6% in elongation. The overall mechanical properties surpass T6-state 6000-series Al-TRB in existing literature, especially in elongation by about 13%, due to the synergistic role of VGR and heat treatment.</p> Graphical Abstract <p></p>

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Effect of variable gauge rolling and heat treatment on microstructure and mechanical property in tailor rolled blanks of aluminum-alloy

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Ying Zhi,
  • Yao Jiang,
  • Dong Wang,
  • Xianlei Hu,
  • Tao Sun,
  • Xianghua Liu

摘要

This paper investigated the effects of variable gauge rolling (VGR), solution treatment, pre-aging, natural aging and bake-hardening on the microstructure and mechanical properties in tailor rolled blanks of aluminum-alloy (Al-TRB). By optimizing the preparation process, the 6000-series Al-TRB with variable thickness, improved bake-hardening response and excellent comprehensive mechanical properties was prepared, characterized by minimal mechanical property differences between the thin and thick zones. The T4P + BH-state Al-TRB shows optimal properties, with 197 and 201 MPa yield strengths, 303 and 295 MPa tensile strengths, 27.6 and 29.4% elongations, and 97 and 106 MPa BH values for the thin and thick zones, with minimal differences of 8 MPa in tensile strength, 4 MPa in yield strength, and 2.6% in elongation. The overall mechanical properties surpass T6-state 6000-series Al-TRB in existing literature, especially in elongation by about 13%, due to the synergistic role of VGR and heat treatment.

Graphical Abstract