改性 9Cr-1Mo 钢和 AISI 316LN SS 异种金属焊接接头的抗断裂行为研究

IF 3 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping Pub Date : 2024-07-15 DOI:10.1016/j.ijpvp.2024.105260

S.A. Krishnan , R. Nikhil , Amey Parnaik , A. Moitra , M. Vasudevan

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引用次数: 0

摘要

通过实验和有限元模拟，研究了由 mod.通过实验和有限元模拟研究了 9Cr-1Mo 钢、AISI 316LN 不锈钢、铬镍铁合金 82 黄油层和铬镍铁合金 182 焊缝的断裂行为。对焊点及其界面进行了金相研究，以确定微观结构对拉伸和断裂性能的影响。使用亚尺寸试样评估了不同焊接区域（即焊接金属、黄油层和热影响区）的拉伸性能。通过测试在不同位置加工出初始裂纹的紧凑型试样，研究了焊点的抗断裂性能。通过对不同区域（即焊接金属、黄油层和热影响区）的裂纹进行有限元分析，获得了用于估算 J-R 曲线的塑性 η 因子。与黄油层和热影响区相比，焊缝金属中的裂纹表现出较低的断裂抗力。此外，还根据裂纹尖端前方的应力三轴性讨论了作用于裂纹的约束条件及其偏差的敏感性。

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Investigation on fracture resistance behaviour of dissimilar metal weld joint of modified 9Cr–1Mo steel and AISI 316LN SS

Fracture behavior of dissimilar metal weld joint consisting of mod. 9Cr–1Mo steel, AISI 316LN stainless steel, Inconel 82 butter layer and Inconel 182 weld has been investigated through experiments and FE simulations. The metallographic studies on weld joint and its interfaces have been carried out to determine the influence of microstructure on tensile and fracture properties. Tensile properties of different weld regions viz., weld metal, butter layer and HAZ have been evaluated using sub-size specimens. Fracture resistance behavior of weld joint has been studied through testing of compact type specimens with initial cracks machined at different locations. The plastic η factors for estimation of J-R curve have been obtained using FE analysis for crack in different regions viz., weld metal, butter layer and HAZ. Crack in weld metal exhibits lower fracture resistance as compared to butter layer and HAZ. Further, the constraint acting on crack and its susceptibility for deviation have been discussed in terms of stress triaxiality ahead of crack tip.

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来源期刊

International Journal of Pressure Vessels and Piping 工程技术-工程：机械

CiteScore

5.30

自引率

13.30%

发文量

208

审稿时长

17 months

期刊介绍： Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants. The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome: • Pressure vessel engineering • Structural integrity assessment • Design methods • Codes and standards • Fabrication and welding • Materials properties requirements • Inspection and quality management • Maintenance and life extension • Ageing and environmental effects • Life management Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time. International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.