Phase Transformation Strengthening of Hot Extruded Inconel 625 under High-temperature Load Environment
Phase Transformation Strengthening of Hot Extruded Inconel 625 under High-temperature Load Environment
复制标题
高温载荷环境下热挤压Inconel 625的相变强化
DOI：
10.1007/s11595-019-2192-x
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发表时间：
2019-12
期刊：
影响因子：
--
通讯作者：
LI Qinglin
中科院分区：
文献类型：
--
作者：
LIU Dexue;CUI Maomao;WANG Wenxu;NAN Hongqiang;CAI Haopeng;XUE Hongdi;JIA Zhi;LI Qinglin
研究了热挤压Inconel 625合金在不同蠕变温度、时效时间和应变速率下的组织演变和性能。实验结果表明，Inconel 625合金在700 °C及以下具有优异的抗蠕变性。当蠕变温度升高到750 °C时，由于相变强化失效，晶界析出大量δ相和σ相，蠕变抗力福尔斯急剧下降。Inconel 625合金特殊的温度敏感特性对其断裂起着重要作用。当应变速率为8.33×10−3s−1时，试样的强度高于其它参数，这是由于相变强化的作用。随着Ni3（Al，Ti）含量的增加，相变强化抑制了层错向孪晶的增厚，提高了合金的综合力学性能。随着时效时间的延长，颗粒状富Cr的M23C6碳化物继续在晶界处析出，阻碍了位错的运动，明显提高了试样的强度。特别是屈服强度提高了几倍。
Microstructure evolution and properties of hot-extruded Inconel 625 alloy were investigated at different creep temperatures, aging time and strain rates. The experimental results indicate that the Inconel 625 alloy exhibits an excellent creep resistance at 700 °C and below. When the creep temperature rises to 750 °C, the creep resistance falls drastically due to the failure of phase transformation strengthening and the precipitation of a large amount of δ phase and σ phase at the grain boundary. The special temperature-sensitive characteristics of Inconel 625 alloy play a very important role in its fracture. When the strain rate is 8.33×10−3s−1, the strength of the specimen is higher than that of other parameters attributed to the effect of phase transformation strengthening. With the increase of Ni3 (Al, Ti), the phase transformation strengthening inhibits thickening of the stacking faults into twins and improves the overall mechanical properties of the alloy. With the increase of the aging time, the granular Cr-rich M23C6carbides continue to precipitate at the grain boundary, which hinders the movement of the dislocations and obviously increases the strength of the samples. Especially, the yield strength increases several times.
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影响因子：
2.7
作者：
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通讯作者：
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通讯作者：
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DOI：
10.1016/j.msea.2013.03.091
发表时间：
2013-08
影响因子：
6.4
作者：
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通讯作者：
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