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Influences of welding processes on fatigue life of cruciform joints of pressure vessel grade steels containing LOP defects

机译：焊接工艺对含LOP缺陷的压力容器级十字形接头疲劳寿命的影响

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摘要

The influences of two welding processes, namely, shielded metal arc weigh (SMAW) and flux cored arc welding (FCAW), on fatigue life of cruciform joints, containing lack of penetration (OP) defects, have been studied. Load carrying cruciform joints were fabricated from high strength, quenched and temperate steels of pressure vessel (ASTM 517 `F') grade. Fatigue crack growth experiments were carried out in a mechanical reasonable vertical pulsator (SCHENCK 200 kN capacity) with a frequency of 30Hz under constant amplitude loading (r=0). It was found that the fatigue lives of the cruciform joins fabricated by the SMAW process were relatively higher than the FCAW counterpart.
机译：研究了两种焊接工艺，即屏蔽金属电弧焊（SMAW）和药芯焊丝电弧焊（FCAW）对十字焊缝疲劳寿命的影响，该焊缝缺乏渗透（OP）缺陷。承载十字形接头由压力容器（ASTM 517'F'）级的高强度，调质和回火钢制成。在恒定振幅载荷下（r = 0），在频率为30Hz的机械合理的垂直波轮（SCHENCK 200 kN容量）中进行疲劳裂纹扩展实验。发现通过SMAW工艺制造的十字形接头的疲劳寿命相对高于FCAW接头。

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