Microstructure and Mechanical Properties of a MP159 Superalloy after Pre-tensile Deformation and Subsequent Annealing,Advanced Engineering Materials

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Microstructure and Mechanical Properties of a MP159 Superalloy after Pre-tensile Deformation and Subsequent Annealing
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2021-09-03 , DOI: 10.1002/adem.202100920
Ji Gu ₁ , Bin Gan ₂ , Zhongnan Bi ₂ , Min Song ₁

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Pre-tensile deformation and subsequent annealing treatments are conducted on a MP159 superalloy. It is shown that pre-tensile deformation can significantly improve the strength of the alloy with obvious sacrifice of the ductility. The subsequent annealing treatment further improves the strength of the alloy but without the consumption of the ductility. The strength and ductility synergy are due to the annealing-induced stacking faults (SFs) and γ′ nanoprecipitates. The length and density of the annealing-induced SFs increase with increasing the imposed pre-tensile strain, and the formation of the SFs contributes significantly to the strain-hardening rate and the ductility of the superalloy.

中文翻译：

MP159高温合金在预拉伸变形和后续退火后的组织和力学性能

在 MP159 高温合金上进行预拉伸变形和随后的退火处理。结果表明，预拉伸变形可以显着提高合金的强度，同时明显牺牲延展性。随后的退火处理进一步提高了合金的强度，但没有消耗延展性。强度和延展性的协同作用是由于退火引起的堆垛层错 (SFs) 和 γ' 纳米析出物。退火诱导的SFs的长度和密度随着施加的预拉伸应变的增加而增加，并且SFs的形成对应变硬化率和高温合金的延展性有显着贡献。

更新日期：2021-09-03

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