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首页> 外文期刊>Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science >Creep-Fatigue Cracking Near the Welded Interface in Friction Welding Dissimilar Superalloys INCONEL 718 and MAR-M247
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Creep-Fatigue Cracking Near the Welded Interface in Friction Welding Dissimilar Superalloys INCONEL 718 and MAR-M247

机译：在摩擦焊接焊接界面附近的蠕变 - 疲劳裂缝，不同的超高级合金Inconel 718和Mar-M247

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摘要

A forged INCONEL 718 and a cast MAR-M247 alloy were joined by a friction welding process. The creep-fatigue strength of this joint was investigated. The life of the joint was significantly shorter than that of the base alloys. The joint failed near the interface of the INCONEL 718 side, although the life of INCONEL 718 was longer than that of MAR-M247. To understand this behavior, the stress field in the welding was numerically analyzed using a visco-elastic model. The results suggested that triaxiality in the stress state could be promoted near the welded interface and lead to an acceleration of creep-fatigue crack nucleation.
机译：通过摩擦焊接工艺连接锻造的Inconel 718和铸造MAR-M247合金。 研究了这种关节的蠕变疲劳强度。 关节的寿命明显短于基础合金。 关节在Inconel 718侧的界面附近失败，尽管Inconel 718的寿命比Mar-M247的寿命长。 为了理解这种行为，使用粘弹性模型进行数值分析焊接中的应力场。 结果表明，在焊接界面附近可以促进应力状态的三轴性，并导致蠕变 - 疲劳裂纹成核的加速度。

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