Exp Fatigue Behavior of Resistance Spot-Welded Unequal Sheet Thickness Austenitic Stainless Steel.

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2. Exp

2.1 Ma Two ty 3.0-1.0 resistan in Tabl Table 1 Mater SUS3 Table 2 Mat SUS3 A mob used w recomm called w current determ force w the actu 2.2 Me The tra proced hydroc The Vi the met 2.3 Ten The te servo-h specim csenet.orgmas hed by Canadian ound that the s us fatigue crac esent work is ng austenitic sta erimental Pro aterials and We ypes of austeni 0 mm joint and nce spot weldi le 1 and 2 resp 1. The chemica rial C 304 0,0 2. The mechan terial Yield 304 bile spot weldin with the elec mendations, th welding sched t possible with mined welding were 4.7 kA, 2 ual conditions etallography an ansverse secti dure. The micr chloric acid and ickers microha tallographic sp nsile-Shear Tes ensile test of hydraulic SHI men are illustrat n Center of Scien spot welded joi cks are easily i to investigate ainless steel. ocedure Welding Process tic stainless st d the other is ing RSW. Th ectively. al composition Ni 076 8,183 nical properties d Strength MP 305 ng machine W trode diamete he spot-weld nu dule required to hout causing e schedule used 20 cycles and in the Indones nd Microhardn ons of weld p rostructure of d 30 ml water. ardness measur pecimens with sts base metal a IMADZU uni ted in Figure 1 Figure 1 Moder nce and Educati int provides a initiated at thi and analyze f ses eel joints, one 1.0 mm and 1 he chemical co n of test materi Cr 18,107 s of test materi Pa Tensile M 6 WT-300SB equ er of 25 mm ugget diameter o produce a we expulsion both d for making th 6 kN respectiv sian Railway I ness Measurem passing throug f austenitic sta Microstructur rements across h a load of 500 and tensile-sh versal testing 1. . Dimension o rn Applied Scien ion localized conn s location und fatigue behavi is the joint be 1.0 mm thick omposition and ials, Wt- Mn 0,252 ials e Strength MPa 670 uipment produc m and a curv r was selected eld nugget size h in the 3.0-1. he test sample vely. Fortunate Industry. ments gh the weld n ainless steel w re investigation s the weld nug g. hear tests of machine. Th of tensile-shear nce nection which der fluctuating ior of the une etween 3.0 mm joint called 1. d mechanical p P Si 0,031 0,38 Elongation 55 ced by Mitsub ved surface r d between 3 an e was determin 0 mm joints a es including w ely, this weldin nugget were pr was revealed b ns were carried gget, HAZ, and the spot-weld he geometry a r test specimen Vol it is a source o loading. Ther qual sheet thi m and 1.0 mm t .0-1.0 mm join properties of t Cu 89 0,209 Electr bishi Electric C adius of 100 nd 10.4 mm. Th ned. This was and 1.0-1.0 mm eld current, w ng schedule w repared by sta by using 10 m d out using an d the base met ded joint wer and dimension ns in mm l. 6, No. 5; May of stress conce refore, the obje ckness resista thick hereinaft nt, were lap jo est materials a Mo 0,486 rical Resistivit μΩ cm 72 Corporation Ja 0 mm. Based he welding par done using the m joints samp eld time and e was in accordan andard metallo ml nitric acids optical micros tal were carrie re performed ns of a typic y 2012 35 entration, ective of ance spot ter called oined by are given V 0,22 ty apan was on the rameters e highest ples. The electrode nce with ographic s, 20 ml scopy. ed out on using a cal RSW www.ccsenet.or 36 These samples region at the c order to provid 2.4 Fatigue Te The fatigue te SHIMADZU spot-welded te These sample to provide sym ends of the sp ratio and frequ until fracture Applied force

3. Results and