旋转摩擦焊接uns42000马氏体不锈钢接头的力学性能和显微组织特征

IF 2.4 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Testing Pub Date : 2023-07-26 DOI:10.1515/mt-2023-0021

Deepak Kumar Madhappan, Ponnusamy Kumaraswamy Palani, D. Thirumalaikumarasamy, Tushar Sonar

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引用次数: 0

摘要

摘要本研究的主要目的是研究旋转摩擦焊接(RFW) UNS S42000马氏体不锈钢接头的力学性能和显微组织特征。焊接接头在316 °C保温1 h后进行空冷去应力处理。摩擦压力为60 MPa、锻造压力为64 MPa、摩擦时间为18 s、锻造时间为4 s的焊接接头具有较好的拉伸性能。显微组织表现为:热处理时焊缝区有碳化物析出、应变诱发和部分应变诱发马氏体，未热处理时焊缝区有粗马氏体和残余奥氏体。拉伸试样的断口形貌显示，热处理试样的断裂模式主要是延性断裂，而非热处理试样的断裂模式主要是延性断裂。显微硬度显示，焊接区由于应变诱发马氏体的存在，硬度值较高，而PDZ处由于部分应变硬化马氏体的存在，硬度值较低。

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Mechanical properties and microstructural features of rotary friction welded UNS S42000 martensitic stainless-steel joints

Abstract The main objective of this investigation is to study the mechanical properties and microstructural features of rotary friction welded (RFW) UNS S42000 martensitic stainless-steel joints. The welded joints were stress relieved at 316 °C for 1 h holding followed by air cooling. The joints welded using the friction pressure of 60 MPa, forging pressure of 64 MPa, friction time of 18 s and forging time of 4 s exhibited superior tensile properties. Microstructure showed carbide precipitates and strain induced and partial strain induced martensite in weld zone for heat treated condition and coarser martensite and retained austenite for non-heat treated condition. Fractography for tensile tested samples reveals predominantly ductile mode of fracture for heat treated samples than non-heat treated condition. The Microhardness showed a higher value of hardness for the weld zone due to strain induced martensite and lesser hardness at PDZ due to partial strain hardened martensite.

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来源期刊

Materials Testing 工程技术-材料科学：表征与测试

CiteScore

4.20

自引率

36.00%

发文量

165

审稿时长

4-8 weeks

期刊介绍： Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.