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<p>The tensile performance of a novel dilute Mg-Ca-Y-Zn-Mn alloy processed by rapidly solidified ribbon consolidation (RSRC) technique was investigated in situ by X-ray diffraction using synchrotron radiation. Moreover, the same study was performed on specimens annealed at 300 and 400&#xa0;°C for 2&#xa0;h after RSRC processing. It was found that annealing at 300&#xa0;°C had no considerable influence on the microstructure and, thus, on the tensile performance. On the other hand, the heat treatment at 400&#xa0;°C yielded an increase in the recrystallized material fraction and the average grain size, coarsening of the secondary Mg<sub>2</sub>Ca phase particles as well as a decrease in the intensity of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\langle 10\overline{1 }0\rangle\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>10</mn> <mover> <mn>1</mn> <mo>¯</mo> </mover> <mn>0</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation> fiber texture. The latter effect caused twinning during tension which contributed to the increase in strain hardening with increasing strain. Due to the texture, mostly non-basal &lt; a &gt; dislocations developed during tensile testing. The interaction between the dominant prismatic &lt; a &gt; dislocations can result in immobile dislocations, which can contribute to the enhanced hardening observed at higher strains.</p>

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Evolution of microstructure during tension in a Mg–Ca–Y–Zn–Mn alloy processed by rapidly solidified ribbon consolidation as revealed by in situ synchrotron X-ray diffraction

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • Jenő Gubicza,
  • Kristián Máthis,
  • Péter Nagy,
  • Péter Jenei,
  • Zoltán Hegedűs,
  • Andrea Farkas,
  • Zsolt Beke,
  • Jozef Veselý,
  • Shin-ichi Inoue,
  • Daria Drozdenko,
  • Yoshihito Kawamura

摘要

The tensile performance of a novel dilute Mg-Ca-Y-Zn-Mn alloy processed by rapidly solidified ribbon consolidation (RSRC) technique was investigated in situ by X-ray diffraction using synchrotron radiation. Moreover, the same study was performed on specimens annealed at 300 and 400 °C for 2 h after RSRC processing. It was found that annealing at 300 °C had no considerable influence on the microstructure and, thus, on the tensile performance. On the other hand, the heat treatment at 400 °C yielded an increase in the recrystallized material fraction and the average grain size, coarsening of the secondary Mg2Ca phase particles as well as a decrease in the intensity of \(\langle 10\overline{1 }0\rangle\) ⟨ 10 1 ¯ 0 ⟩ fiber texture. The latter effect caused twinning during tension which contributed to the increase in strain hardening with increasing strain. Due to the texture, mostly non-basal < a > dislocations developed during tensile testing. The interaction between the dominant prismatic < a > dislocations can result in immobile dislocations, which can contribute to the enhanced hardening observed at higher strains.