Scholarlink

<p>Two different microstructures, lamellar primary α<sub>p</sub> grains in a matrix of β transformed microstructure and full fine lamellar structure, were produced by forging process in α + β phases at 1000&#xa0;°C and in β phase at 1050&#xa0;°C followed by 1000&#xa0;°C/1&#xa0;h/AC solid solution and 700&#xa0;°C/5&#xa0;h/AC aging heat treatment process in near α-titanium alloys. The ultimate strength at room temperature (RT) is almost the same for both microstructure specimens. The creep properties of lamellar primary α<sub>p</sub> grains surrounded by β-transformed microstructure are better than that of full fine lamellar structure, indicating the plastic creep strains were 0.108% and 0.113%, respectively, under creep test of 650&#xa0;°C/100&#xa0;MPa /100&#xa0;h. The higher creep resistance of the lamellar primary α<sub>p</sub> structure in alloy forged in α + β phase has less precipitated silicide than that in alloy forged in β phase; more content of solid solution of Si and α<sub>2</sub> precipitation is beneficial for the improvement of creep resistance.</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

Effect of Microstructure on the Creep Properties in High-Temperature Titanium Alloy after Different Forging Temperatures

  • 期刊论文

  • 发表日期：

    2026年1月13日

查看全文
  • Jifei Hu,
  • Peng Qi,
  • Wu Wei,
  • Bolong Li,
  • Tongbo Wang,
  • Jiaming Yin,
  • Zuoren Nie

摘要

Two different microstructures, lamellar primary αp grains in a matrix of β transformed microstructure and full fine lamellar structure, were produced by forging process in α + β phases at 1000 °C and in β phase at 1050 °C followed by 1000 °C/1 h/AC solid solution and 700 °C/5 h/AC aging heat treatment process in near α-titanium alloys. The ultimate strength at room temperature (RT) is almost the same for both microstructure specimens. The creep properties of lamellar primary αp grains surrounded by β-transformed microstructure are better than that of full fine lamellar structure, indicating the plastic creep strains were 0.108% and 0.113%, respectively, under creep test of 650 °C/100 MPa /100 h. The higher creep resistance of the lamellar primary αp structure in alloy forged in α + β phase has less precipitated silicide than that in alloy forged in β phase; more content of solid solution of Si and α2 precipitation is beneficial for the improvement of creep resistance.