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首页> 外文期刊>Journal of Materials Engineering and Performance >Characterization of Mechanical Properties and Residual Stress in API 5L X80 Steel Welded Joints
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Characterization of Mechanical Properties and Residual Stress in API 5L X80 Steel Welded Joints

机译：API 5L X80钢焊接接头机械性能和残余应力的表征

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摘要

The use of high-strength and low-alloy steels, high design factors and increasingly stringent safety requirements have increased the operating pressure levels and, consequently, the need for further studies to avoid and prevent premature pipe failure. To evaluate the possibility of improving productivity in manual arc welding of this type of steel, this work characterizes the mechanical properties and residual stresses in API 5L X80 steel welded joints using the SMAW and FCAW processes. The residual stresses were analyzed using x-ray diffraction with the sin(2) psi method at the top and root of the welded joints in the longitudinal and transverse directions of the weld bead. The mechanical properties of the welded joints by both processes were characterized in terms of tensile strength, impact toughness and Vickers microhardness in the welded and shot peening conditions. A predominantly compressive residual stress was found, and shot peening increased the tensile strength and impact toughness in both welded joints.
机译：使用高强度和低合金钢，高设计因素和日益严格的安全要求增加了工作压力水平，因此需要进一步研究以避免和预防过早的管道故障。为了评估在这种类型的钢中提高手动弧焊生产率的生产率的可能性，这项工作表征了使用Smaw和Fcaw工艺的API 5L X80钢焊接接头中的机械性能和残余应力。使用X射线衍射与焊接接头的顶部和根部的X射线衍射进行分析残余应力在焊接珠的纵向和横向方向上。两种方法的焊接接头的机械性能表征在焊接和喷丸条件下的拉伸强度，冲击韧性和维氏微硬度方面的表征。发现了主要的压缩残余应力，并且喷丸喷丸增加了焊接接头中的拉伸强度和冲击韧性。

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