Scholarlink

<p>In order to reveal the effect of directional solidification on the microstructure evolution and mechanical properties of Incoloy 825 alloy, directional solidification of Incoloy 825 alloy was carried out at different withdrawal rates (10–200&#xa0;μm/s). The results show that with the increase of the withdrawal rate, the primary and secondary dendritic spacings decrease from 138 to 26&#xa0;μm and from 44 to 14&#xa0;μm, respectively. The shape of the solid–liquid interface changes from convex to flat and then concave. The overall segregation of elements becomes larger and then smaller; Cu<sub>0.81</sub>Ni<sub>0.19</sub> and MC are mainly distributed in the grain boundary, and the content continues to increase. The tensile strength increases from 380 to 586&#xa0;MPa, and the elongation rises from 46.7 to 54.9%. The fracture mechanism changes from mixed fracture with brittle fractures predominating to mixed fracture with ductile fractures.</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

Microstructure Evolution and Mechanical Property of Directionally Solidified Incoloy 825 Alloy

  • 期刊论文

  • 发表日期：

    2025年3月26日

查看全文
  • Zhi Jia,
  • Chengwei Liang,
  • Min Yang,
  • Yinming Li,
  • Chi Zhang,
  • Yanjiang Wang,
  • Xuming Wang,
  • Fuqiang Chang

摘要

In order to reveal the effect of directional solidification on the microstructure evolution and mechanical properties of Incoloy 825 alloy, directional solidification of Incoloy 825 alloy was carried out at different withdrawal rates (10–200 μm/s). The results show that with the increase of the withdrawal rate, the primary and secondary dendritic spacings decrease from 138 to 26 μm and from 44 to 14 μm, respectively. The shape of the solid–liquid interface changes from convex to flat and then concave. The overall segregation of elements becomes larger and then smaller; Cu0.81Ni0.19 and MC are mainly distributed in the grain boundary, and the content continues to increase. The tensile strength increases from 380 to 586 MPa, and the elongation rises from 46.7 to 54.9%. The fracture mechanism changes from mixed fracture with brittle fractures predominating to mixed fracture with ductile fractures.