The effect of final heat treatment temperature on radiation response of V-4Cr-4Ti
The effect of final heat treatment temperature on radiation response of V-4Cr-4Ti
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DOI：
10.1016/j.jnucmat.2010.12.075
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发表时间：
2011-10
影响因子：
3.1
通讯作者：
T. Muroga;T. Nagasaka;Hideo Watanabe;M. Yamazaki
中科院分区：
文献类型：
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作者：
T. Muroga;T. Nagasaka;Hideo Watanabe;M. Yamazaki
对1073-1373K热处理1h的V-4Cr-4Ti （NIFS-HEAT-2）在JMTR中进行673K ~ ~ 0.11dpa的中子辐照和辐照后检验，考虑中子辐照的影响，优化热处理条件。辐照后的V-4Cr-4Ti在1073-1273K时硬度和Charpy冲击性能基本一致，与未辐照的V-4Cr-4Ti在1173K时硬度最小，冲击性能最佳形成强烈对比。然而，在1373K辐照后，显著硬化和DBTT增加。在1173 ~ 1273k辐照下，TEM观察到相似的显微组织，析出相密度高，位错密度很低。讨论了热处理温度在1073 ~ 1273之间辐照后性能弱依赖的机理以及本研究对确定退火温度的意义。
Neutron irradiation in JMTR at 673K to ∼0.11dpa and post-irradiation examinations were carried out on V–4Cr–4Ti (NIFS-HEAT-2) heat-treated at 1073–1373K for 1h, for the purpose of optimizing the heat treatment conditions considering the effect of neutron irradiation. After irradiation, hardness and Charpy impact properties were similar with each other at 1073–1273K, which is in strong contrast with the unirradiated V–4Cr–4Ti, which showed clearly minimum hardness and optimum impact property at 1173K. Significant hardening and an increase in DBTT occurred after irradiation, however, at 1373K. TEM observations showed similar microstructure with high density of precipitates and very low dislocation density at 1173–1273K following irradiation. The mechanism of the weak dependence of properties after irradiation for the heat treatment temperatures between 1073 and 1273 and implication of the present study to determining annealing temperature was discussed.