Effects of Withdrawal Rate during Thermally-controlled Solidification on Microstructure and Endurance Property of Equiaxed Ni-based Superalloy

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Effects of Withdrawal Rate during Thermally-controlled Solidification on Microstructure and Endurance Property of Equiaxed Ni-based Superalloy
“高温合金因其卓越的铸造性能和力学性能，成为发动机涡轮叶片和复杂热端部件的理想选择。近期研究关注抽拉速率对热控凝固工艺制备的等轴晶合金热处理组织及高温高压下持久性能的影响。随着抽拉速率增加，合金显微缩松增多，晶粒尺寸和γ/γ′共晶减小，促进了γ′相的析出与长大。在1050℃和120MPa条件下，持久断裂寿命随抽拉速率增加而显著降低。分析显示，晶粒细化、γ′相筏排化程度增加、缩松导致微裂纹快速萌生，以及碎化碳化物对裂纹扩展的阻碍作用减弱，共同导致合金持久性能下降。这一发现为高温合金的制造和应用提供了重要参考。”

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Vol. 44, Issue 4, Pages: 541-545(2024)
Published： 20 April 2024 ，
DOI： 10.15980/j.tzzz.2024.04.020

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曹国强，沈煜乔，李钢，等. 热控凝固抽拉速率对等轴晶镍基高温合金组织和持久性能影响［J］. 特种铸造及有色合金，2024，44（4）：541-545.

CAO G Q，SHEN Y Q，LI G，et al. Effects of withdrawal rate during thermally-controlled solidification on microstructure and endurance property of equiaxed ni-based superalloy［J］. Special Casting & Nonferrous Alloys，2024，44（4）：541-545.
曹国强，沈煜乔，李钢，等. 热控凝固抽拉速率对等轴晶镍基高温合金组织和持久性能影响［J］. 特种铸造及有色合金，2024，44（4）：541-545. DOI： 10.15980/j.tzzz.2024.04.020.

CAO G Q，SHEN Y Q，LI G，et al. Effects of withdrawal rate during thermally-controlled solidification on microstructure and endurance property of equiaxed ni-based superalloy［J］. Special Casting & Nonferrous Alloys，2024，44（4）：541-545. DOI： 10.15980/j.tzzz.2024.04.020.

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