Scholarlink

<p>Magnesium alloys have poor formability at room temperature, which limits their large-scale use. Traditional furnace heating for hot forming is inefficient and consumes a large amount of energy. This study focuses on AZ31B magnesium alloy and systematically compares two heating methods: contact heating and furnace heating, both combined with isothermal U-shaped stamping at 250 ℃. Mechanical properties were evaluated through tensile tests and microhardness measurements. Microstructural evolution and fracture behavior were analyzed using electron backscatter diffraction and scanning electron microscopy. The results indicate that parts produced by both heating methods exhibit similar mechanical properties. The yield strength remains between 148 and 150&#xa0;MPa, the tensile strength is around 276–280&#xa0;MPa, and the elongation at fracture increases by 16.4–18.3% compared with the initial state. The contact heating method rapidly heats the material within 15&#xa0;s, effectively limiting grain growth and weakening the texture. The grain size of contact-heated samples (6.28&#xa0;μm) is smaller than that of furnace-heated samples (6.80&#xa0;μm), with a correspondingly lower basal plane texture intensity. The volume fraction of recrystallized grains increases only slightly under both heating methods. In both cases, plastic deformation is primarily accommodated by non-basal slip systems. Contact heating substantially improves heating efficiency while maintaining forming quality, offering an energy-efficient approach for hot forming magnesium alloys.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Feasibility and microstructural mechanism analysis of AZ31B magnesium alloy contact heating-isothermal forming process

  • 期刊论文

  • 发表日期：

    2026年5月4日

查看全文
  • Wei Pan,
  • Zhiqiang Zhang,
  • Yangxi Zhao,
  • Mingwen Ren,
  • Hongjie Jia

摘要

Magnesium alloys have poor formability at room temperature, which limits their large-scale use. Traditional furnace heating for hot forming is inefficient and consumes a large amount of energy. This study focuses on AZ31B magnesium alloy and systematically compares two heating methods: contact heating and furnace heating, both combined with isothermal U-shaped stamping at 250 ℃. Mechanical properties were evaluated through tensile tests and microhardness measurements. Microstructural evolution and fracture behavior were analyzed using electron backscatter diffraction and scanning electron microscopy. The results indicate that parts produced by both heating methods exhibit similar mechanical properties. The yield strength remains between 148 and 150 MPa, the tensile strength is around 276–280 MPa, and the elongation at fracture increases by 16.4–18.3% compared with the initial state. The contact heating method rapidly heats the material within 15 s, effectively limiting grain growth and weakening the texture. The grain size of contact-heated samples (6.28 μm) is smaller than that of furnace-heated samples (6.80 μm), with a correspondingly lower basal plane texture intensity. The volume fraction of recrystallized grains increases only slightly under both heating methods. In both cases, plastic deformation is primarily accommodated by non-basal slip systems. Contact heating substantially improves heating efficiency while maintaining forming quality, offering an energy-efficient approach for hot forming magnesium alloys.