Scholarlink

<p>In order to improve the poor tensile rupture property of the newly designed Ti-44Al-4Nb-1W-0.1B alloy under high tensile stress conditions, the heat treatment method of HIP + annealing was designed to solve this problem. The as-cast Ti-44Al-4Nb-1W-0.1B alloy was heat-treated at 1150&#xa0;°C for different times, and the microstructure changes were observed. The results show that with the increase of heat treatment time, the content of B2 phase decreases from 14.87 to 2.83%, and the thickness of the layered layer increases from 0.37 to 1.27&#xa0;μm. Considering the influence of B2 phase content and layer thickness on the properties, 2–6 hours was determined as the best heat treatment time. The tensile rupture properties of the alloy under HIP and HIP + optimum heat treatment process were compared. The results show that the tensile rupture life of the alloy sample increases from 42.81 hours under HIP conditions to 60.76 hours under HIP + HT conditions. The property improvement is mainly due to the fact that heat treatment effectively reduces the content of B2 phase, reduces the nucleation probability of holes and cracks, helps to alleviate local stress concentration, promotes the uniform distribution of strain in the material and improves the tensile rupture property of the alloy.</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

Enhanced Tensile Rupture Property of As-Cast Ti-44Al-4Nb-1W-0.1B Alloy After Hot Isostatic Pressure and Annealing

  • 期刊论文

  • 发表日期：

    2026年1月16日

查看全文
  • Shulin Dong,
  • Jiarui Zhou,
  • Junchong Gao,
  • Shibing Liu,
  • Yingdong Qu,
  • Ruirun Chen,
  • Guanglong Li,
  • Wei Zhang

摘要

In order to improve the poor tensile rupture property of the newly designed Ti-44Al-4Nb-1W-0.1B alloy under high tensile stress conditions, the heat treatment method of HIP + annealing was designed to solve this problem. The as-cast Ti-44Al-4Nb-1W-0.1B alloy was heat-treated at 1150 °C for different times, and the microstructure changes were observed. The results show that with the increase of heat treatment time, the content of B2 phase decreases from 14.87 to 2.83%, and the thickness of the layered layer increases from 0.37 to 1.27 μm. Considering the influence of B2 phase content and layer thickness on the properties, 2–6 hours was determined as the best heat treatment time. The tensile rupture properties of the alloy under HIP and HIP + optimum heat treatment process were compared. The results show that the tensile rupture life of the alloy sample increases from 42.81 hours under HIP conditions to 60.76 hours under HIP + HT conditions. The property improvement is mainly due to the fact that heat treatment effectively reduces the content of B2 phase, reduces the nucleation probability of holes and cracks, helps to alleviate local stress concentration, promotes the uniform distribution of strain in the material and improves the tensile rupture property of the alloy.