Influence of thermal shock behavior on microstructure and mechanical properties of IN718 superalloy
Influence of thermal shock behavior on microstructure and mechanical properties of IN718 superalloy
复制标题
热震行为对IN718高温合金显微组织和力学性能的影响
DOI：
10.1016/j.apsusc.2019.04.047
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发表时间：
2019-08
影响因子：
6.7
通讯作者：
Xiang Ding han
中科院分区：
文献类型：
--
作者：
Wang Shu liang;Sun Yan rong;Du Li jing;Liu Li;Wang Jie;Xiang Ding han
The influence of thermal shock behavior between 960 °C and room temperature on microstructure and tensile properties of IN718 alloy after three heat treatments was investigated in this paper. The experiments show that protective and dense oxide films with the composition of Cr2O3, Ti0.95Nb0.95O4and (Cr, Fe)2O3are formed on the surface of alloys. The average oxide films increased with the thermal shock cycle. The thermal shock behavior changed the distribution and quantities of δ phases, which have significantly reduced the strength and increased the elongation of IN718 alloy. The decrease of strength was mainly determined by the dissolution of strengthening phase and grain coarsening. High standard treatment alloy shows the best thermal shock resistance since the strength decreased smallest after thermal shock.
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