Recrystallization behavior of hot-rolled pure tungsten and its alloy plates during high-temperature annealing
Recrystallization behavior of hot-rolled pure tungsten and its alloy plates during high-temperature annealing
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DOI：
10.1016/j.nme.2018.04.004
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发表时间：
2018-05-01
影响因子：
2.6
通讯作者：
Fukuda, Makoto
中科院分区：
文献类型：
--
作者：
Tsuchida, Kohei;Miyazawa, Takeshi;Fukuda, Makoto
我们的目的是澄清的行为的晶粒结构和硬度的变化的热轧纯W及其合金板开发的各种性能，通过保持在高温下长时间和短时间在没有辐射。在1100 ℃下进行等温退火10-3115 h。在1100至2300 ℃的温度范围内进行等温退火1小时。在热处理后，使用电子背散射衍射（EBSD）观察晶粒结构，并在观察平面内测量维氏硬度。纯W在1100 ℃下进行1小时的短时间热处理时不发生再结晶，而纯W在1100 ℃下进行3115小时的长时间热处理时发生再结晶。由于K气泡的弥散和Re的固溶，再结晶发生的温度和时间增加。考虑到聚变反应堆的实际运行周期，1100摄氏度的温度可能导致重结晶。有必要降低最高操作温度或通过合金化使用具有高再结晶温度的材料。
We aimed to clarify the behavior of change in the grain structure and hardness of hot-rolled pure W and its alloys plates developed for various properties by holding at high temperature for long and short durations in the absence of irradiation. The isothermal annealing was performed at 1100 degrees C for 10-3115 h. The isochronous annealing was performed for 1 h in a temperature range of 1100 to 2300 degrees C. After heat treatment, the grain structure was observed using electron backscatter diffraction (EBSD) and the Vickers hardness was measured in the observed plane. Pure W did not recrystallize by the heat treatment for a short duration of 1 h at 1100 degrees C, while the recrystallization of pure W progressed during the heat treatment for long duration of 3115 h at 1100 degrees C. The temperature and duration at which the recrystallization occurs increase because of the dispersion of K bubbles and solid solution of Re. Considering the actual operation period of fusion reactors, a temperature of 1100 degrees C can result in recrystallization. It is necessary to decrease the maximum operating temperature or to use materials having a high recrystallization temperature by alloying.