Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel

J. Mater. Sci. Technol. ›› 2007, Vol. 23 ›› Issue (03): 319-322.

Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel

刘伟

北京交通大学机电学院

收稿日期:2006-04-20 修回日期:2006-08-22 出版日期:2007-05-28 发布日期:2009-10-10
通讯作者: 刘伟

Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel

Wei LIU, Jun HE, Meng FAN, Peide LU, Li SHAO

School of Mechanical and Electronic Control Engineering, Beijing Jiao Tong University, Beijing 100044, China...

Received:2006-04-20 Revised:2006-08-22 Online:2007-05-28 Published:2009-10-10
Contact: Wei LIU

摘要/Abstract

关键词: 301L, stainless, steel, Resistance, spot, wel

Abstract: Transformation induced plasticity (TRIP) and twinning induced plasticity (TWIP) effects had been widely studied in single austenite steel. But in duplex γ & α(δ) phase, such as welding materials of stainless steel, they had been less studied. Tensile shear loading experiment of resistance spot welding specimens prepared with 2 mm 301L sheets, was carried out at 15℃ and -50℃. Optical microscopy and scanning electron microscopy (SEM) as well as X-ray diffraction (XRD) were used to investigate the microstructure of weld nugget, and specimens fracture surface. The results showed that the initial weld nugget was composed of 8.4% α(δ) ferrite and 91.6% austenite. Tensile shear load bearing capacity of spot welding specimen at -50℃ was 24.8 kN, 17.7% higher than that at 15℃. About 78.5 vol. pct. martensite transformation was induced by plastic deformation at -50℃, while about 67.9 vol. pct transformation induced at 15℃. The plasticity of spot welding joint decreased with the decline of experimental temperature.

Key words: 301L stainless steel, Resistance spot welding, Duplex γ & α(δ)...

刘伟. Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel[J]. J. Mater. Sci. Technol., 2007, 23(03): 319-322.

Wei LIU, Jun HE, Meng FAN, Peide LU, Li SHAO. Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel[J]. J Mater Sci Technol, 2007, 23(03): 319-322.

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Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel

Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel

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