中文摘要：

在这篇论文，韧性剧降裂开(DDC ) 在不同压力状态下面的在 Inconel600 同伴 Filler 金属 82 的危险性(FM82 ) 被调查。Inconel600 是有到一般腐蚀，局部性的腐蚀，和压力腐蚀的优秀抵抗的 Ni-Cr-Fe 合金，它广泛地尽最大努力被使用了植物。然而，同伴 FM82 被显示了产生在焊接过程的 DDC。解决这个问题，这个工作主要集中于在焊接过程在 FM82 评估 DDC 危险性。首先，到破裂(STF ) 测试的紧张被用来在简单压力状态下面完成 DDC 标准，并且 DDC 的形成机制被解释。真实焊接是有复杂压力状态的一个过程。后来，强调状态在建筑群下面得到 DDC 危险性，关于焊接的多传递的模型借助于有限元素方法被建立。根据数字模拟结果，变丑和温度历史的关系被完成。而且，易受影响的地点和时刻能被决定把结果与 STF 联系了。模拟结果相当适合从另一研究焊接实验。

英文摘要：

In this paper, Ductility Dip Cracking （DDC） susceptibility in Inconel600 companion Filler Metal 82 （FM82） under different stress states is investigated. Inconel600 is a Ni-Cr-Fe alloy with excellent resistance to general corrosion, localized corrosion, and stress corrosion, which has been widely used in nuclear power plants. However, the companion FM82 has been shown to be susceptible to DDC in welding process. To resolve the problem, this work is mainly focused on evaluating DDC susceptibility in FM82 in welding process. First of all, Strain to Fracture （STF） test is used to achieve the DDC criterion under simple stress state, and the formation mechanism of DDC was explained. Real welding is a process with complex stress state. Later, to get the DDC susceptibility under complex stress state, models about multi-pass welding were built up by means of finite element method. According to numerical simulation results, relationship of deformation and temperature history is achieved. Moreover, susceptible locations and moments could be determined associated with STF results. The simulation results fairly agree with welding experiment from another research.