Control of welding residual stress for ensuring integrity against fatigue and stress-corrosion cracking
Control of welding residual stress for ensuring integrity against fatigue and stress-corrosion cracking
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DOI：
10.1016/j.nucengdes.2006.05.006
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发表时间：
2007-01-01
影响因子：
1.7
通讯作者：
Mochizuki, Masahito
中科院分区：
文献类型：
--
作者：
Mochizuki, Masahito
本文讨论了几种残余应力控制技术的可用性。通过数值分析和实际实验验证了这些技术在防止疲劳和应力腐蚀开裂方面的有效性。焊接过程中用于减少残余应力的过程控制比使用焊后处理更容易应用。例如，多道焊的焊道顺序控制应用于十字形接头和具有X形坡口的对接接头。然而，焊后工艺的残余应力得到改善。水射流喷丸有助于获得表面的残余压缩应力，并验证了抗疲劳和应力腐蚀开裂的耐受性。由于从冶金角度来看，采用耐腐蚀材料进行熔覆对于防止应力腐蚀裂纹也很有效，因此需要仔细考虑母材界面处的残余应力。确认熔覆边缘附近母材的残余应力在裂纹产生的公差范围内。发现焊接过程期间和之后的控制方法对于确保焊接部件的完整性是有效的。 (c) 2006 Elsevier B.V. 保留所有权利。
The availability of several techniques for residual stress control is discussed in this paper. The effectiveness of these techniques in protecting from fatigue and stress-corrosion cracking is verified by numerical analysis and actual experiment. In-process control during welding for residual stress reduction is easier to apply than using post-weld treatment. As an example, control of the welding pass sequence for multi-pass welding is applied to cruciform joints and butt-joints with an X-shaped groove. However, residual stress improvement is confirmed for post-weld processes. Water jet peening is useful for obtaining a compressive residual stress on the surface, and the tolerance against both fatigue and stress-corrosion cracking is verified. Because cladding with a corrosion-resistant material is also effective for preventing stress-corrosion cracking from a metallurgical perspective, the residual stress at the interface of the base metal is carefully considered. The residual stress of the base metal near the clad edge is confirmed to be within the tolerance of crack generation. Controlling methods both during and after welding processes are found to be effective for ensuring the integrity of welded components. (c) 2006 Elsevier B.V. All rights reserved.