Scholarlink

<p>The quantitative correlation between γ′ precipitation evolution and competing deformation mechanisms in GH4151 superalloy under various heat treatment conditions remains unclear. Through systematically designed solution treatments, three distinct γ′ precipitation distributions were achieved, and tensile properties were characterized at room temperature and 800&#xa0;°C. The deformed microstructure was characterized, γ′ precipitates were quantified, and fracture mechanisms were identified by scanning and transmission electron microscopy. The results demonstrate that the strengthening effect of the secondary γ′ precipitations depends on the synergistic contributions of the stacking fault (SF) and anti-phase boundary (APB) shearing associated with its size. The optimal strength performance is achieved at a secondary γ′ precipitate size of 115&#xa0;nm, where APB shearing dominates while maintaining a balanced contribution with SF shearing mechanisms. Based on experimental evidence, quantitative correlations between the size of γ′ precipitates and deformation strengthening mechanisms are systematically established, with yield strength as the primary evaluation metric. Furthermore, the critical resolved shear stresses for the strengthening mechanisms under the given conditions are derived, and the contributions of various strengthening mechanisms are analyzed separately. Clarification of the dominant strengthening mechanisms and establishment of quantitative criteria for tailoring γ′ precipitates to achieve optimal strength in GH4151 superalloy are presented.</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

Contribution roles of different size γ’ precipitation during tensile deformation at intermediate temperatures in a Ni-based superalloy GH4151

  • 期刊论文

  • 发表日期：

    2026年5月4日

查看全文
  • Xin-Yu Meng,
  • Shao-Min Lyu,
  • Xing-Fei Xie,
  • Chao Tang,
  • Wu-Gang Yu,
  • Wei-Xue Hou,
  • Cheng-Yu Wang,
  • Jing-Long Qu,
  • Jin-Hui Du

摘要

The quantitative correlation between γ′ precipitation evolution and competing deformation mechanisms in GH4151 superalloy under various heat treatment conditions remains unclear. Through systematically designed solution treatments, three distinct γ′ precipitation distributions were achieved, and tensile properties were characterized at room temperature and 800 °C. The deformed microstructure was characterized, γ′ precipitates were quantified, and fracture mechanisms were identified by scanning and transmission electron microscopy. The results demonstrate that the strengthening effect of the secondary γ′ precipitations depends on the synergistic contributions of the stacking fault (SF) and anti-phase boundary (APB) shearing associated with its size. The optimal strength performance is achieved at a secondary γ′ precipitate size of 115 nm, where APB shearing dominates while maintaining a balanced contribution with SF shearing mechanisms. Based on experimental evidence, quantitative correlations between the size of γ′ precipitates and deformation strengthening mechanisms are systematically established, with yield strength as the primary evaluation metric. Furthermore, the critical resolved shear stresses for the strengthening mechanisms under the given conditions are derived, and the contributions of various strengthening mechanisms are analyzed separately. Clarification of the dominant strengthening mechanisms and establishment of quantitative criteria for tailoring γ′ precipitates to achieve optimal strength in GH4151 superalloy are presented.