ITER偏滤器钨/铜穿管模块的高热负荷测试及事后分析

摘要

High heat flux test of ITER divertor W/Cu monoblock mock-ups were finished. All tested mock-ups successfully withstood the heat cycles above and met the requirements of high heat flux performances specified by IO. After HHF test, the post analysis was performed on tested mock-ups. The results found the debonding of the Cu/CuCrZr interface and the crack of W. The scanning electron microscope (SEM) image of the break shows that intergranular rupture was the main mechanism of the W crack. The recrystallization was observed in the W monoblocks and the recrystallized depth was estimated by metallography analysis. The temperature distribution was also obtained by finite element analysis and a good correspondence with recrystallization observed by experiment was found.%对ITER偏滤器钨/铜穿管模块进行了高热负荷测试.测试结果表明,所有的模块都成功承受住了热负荷测试并满足了IO的要求.在高热负荷测试后,对模块进行了事后分析.发现了钨的纵向开裂和Cu/CuCrZr界面的开焊现象.断口的SEM图像表明,钨的开裂方式为脆性的沿晶开裂.通过金相学分析,发现了钨的再结晶现象和钨表面的再结晶深度.还通过有限元分析软件模拟得到了模块的温度分布,并且与实验观察的再结晶现象能够很好的对应.