%0 Journal Article
%T Deformation at Room and Low Temperatures and Martensite Transformation in Resistance Spot Welding Duplex γ & α(δ) Materials of 301L Stainless Steel
%A Wei
%A LIU
%A Jun
%A HE
%A Meng
%A FAN
%A Peide
%A LU
%A Li
%A SHAO
%J 材料科学技术学报
%D 2007
%I 
%X Transformation induced plasticity （TRIP） and twinning induced plasticity （TWlP） 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.
%K 301L不锈钢
%K 电阻点焊
%K 双相钢
%K 塑性形变
%K 马氏体相转变
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=18BCC48371B3E65E&yid=A732AF04DDA03BB3&vid=EA389574707BDED3&iid=38B194292C032A66&sid=160561E9A96393DE&eid=3224764AEAFCF8C2&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=0