Scholarlink

<p>CMT-PADV is a kind of pulse alternative current CMT process. In this paper, the effect of the CMT-PADV + arc weaving process on the macro-morphology, microstructure, porosity and mechanical properties of the deposited specimens was investigated for the additive manufacturing of Al-Mg-Sc alloy. The results showed that the CMT-PADV + arc weaving process resulted in improved forming accuracy, finer and more uniform microstructure and higher percentage of high-angle grain boundary in the specimens. The effective material utilization rate of the formed parts increased from 64.16 to 79.03%, and the average grain size was refined from 11.69 to 10.26&#xa0;μm. The arc weaving could effectively inhibit the porosity, and the porosity rate of the deposited parts was reduced from 0.22 to 0.1%. None of the prepared deposited parts showed obvious anisotropy. Compared with the CMT-PADV process, the ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) of the specimens with the CMT-PADV + arc weaving process were significantly improved, with the most obvious increase in elongation. Finally, the inhibition mechanism of porosity, microstructure change and grain refinement mechanism, and performance enhancement mechanism are discussed.</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

Study on the Microstructure and Properties of Additive Manufacturing Al-Mg-Sc Alloy with CMT-PADV + Arc Weaving Process

  • 期刊论文

  • 发表日期：

    2025年7月7日

查看全文
  • Hongfei Xu,
  • Lijun Yang,
  • Yiming Huang,
  • Ying Wang

摘要

CMT-PADV is a kind of pulse alternative current CMT process. In this paper, the effect of the CMT-PADV + arc weaving process on the macro-morphology, microstructure, porosity and mechanical properties of the deposited specimens was investigated for the additive manufacturing of Al-Mg-Sc alloy. The results showed that the CMT-PADV + arc weaving process resulted in improved forming accuracy, finer and more uniform microstructure and higher percentage of high-angle grain boundary in the specimens. The effective material utilization rate of the formed parts increased from 64.16 to 79.03%, and the average grain size was refined from 11.69 to 10.26 μm. The arc weaving could effectively inhibit the porosity, and the porosity rate of the deposited parts was reduced from 0.22 to 0.1%. None of the prepared deposited parts showed obvious anisotropy. Compared with the CMT-PADV process, the ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) of the specimens with the CMT-PADV + arc weaving process were significantly improved, with the most obvious increase in elongation. Finally, the inhibition mechanism of porosity, microstructure change and grain refinement mechanism, and performance enhancement mechanism are discussed.