Effect of post-weld heat treatment and neutron irradiation on a dissimilar-metal joint between F82H steel and 316L stainless steel
Effect of post-weld heat treatment and neutron irradiation on a dissimilar-metal joint between F82H steel and 316L stainless steel
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DOI：
10.1016/j.fusengdes.2015.06.079
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发表时间：
2015-10
影响因子：
1.7
通讯作者：
H. Fu;T. Nagasaka;Nobuyuki Kometani;T. Muroga;W. Guan;S. Nogami;K. Yabuuchi;T. Iwata;A. Hasegawa-A.
中科院分区：
文献类型：
--
作者：
H. Fu;T. Nagasaka;Nobuyuki Kometani;T. Muroga;W. Guan;S. Nogami;K. Yabuuchi;T. Iwata;A. Hasegawa-A.
采用电子束焊接技术在F82 H钢与316L不锈钢之间制备异种金属焊接接头。通过显微组织分析和硬度测试，将F82 H热影响区分为中间层区、细晶区和粗碳化物区。采用焊后热处理（PWHT）控制热影响区的硬度。在680 °C下PWHT 1 h后，在比利时反应堆II（BR-II）中对接头进行300 °C下剂量为0.1 dpa的中子辐照。与母材和焊缝相比，F82 H细晶热影响区具有显著的辐照硬化，最高可达450 HV。而在F82 H焊接热影响区加工V型缺口根部的F82 H-HAZ试样，尽管有明显的辐照硬化，但其冲击性能并没有明显恶化。
A dissimilar-metal joint between F82H steel and 316L stainless steel was fabricated by using electron beam welding (EBW). By microstructural analysis and hardness test, the heat-affected zone (HAZ) of F82H was classified into interlayer area, fine-grain area, and coarse-carbide area. Post-weld heat treatment (PWHT) was applied to control the hardness of HAZ. After PWHT at 680 °C for 1 h, neutron irradiation at 300 °C with a dose of 0.1 dpa was carried out for the joint in Belgian Reactor II (BR-II). Compared to the base metals (BMs) and weld metal (WM), significant irradiation hardening up to 450HV was found in the fine-grain HAZ of F82H. However, the impact property of F82H-HAZ specimens, which was machined with the root of the V-notch at HAZ of F82H, was not deteriorated obviously in spite of the significant irradiation hardening.