In the present study, 6 mm nominal thickness dissimilar steel plates were joined using friction stir welding. The materials used were duplex stainless steel and low alloy structural steel. The weld was assessed by metallographic examination and mechanical testing (transverse tensile and fatigue). Microstructural examination identified four distinct weld zones and a substantially hard region within the stir zone at the base of the weld tool pin. Fatigue specimens demonstrated high level fatigue life and identified four distinct fracture modes.
BhadeshiaH. K. D. H.: ‘Editorial’, Sci. Technol. Weld. Join., 2010, 15, 646–647. doi: 10.1179/136217110X12886936510243
2.
PanT.: ‘Friction stir spot welding (FSSW)—a literature review’, SAE Technical Paper No. 2007-01-1702, Society of Automotive Engineers, Warrendale, PA, USA; 2007.
3.
FairchildD., KumarA., FordS., NissleyN., AyerR., JinH., , Proc. 8th Int. Conf. on ‘Trends in welding research’, Pine Mountain, GA, USA, June 2008, ASM International371–380.
4.
WangJ., LuM., ZhangL., ChangW., XuL. and HuL.: ‘Effect of welding process on the microstructure and properties of dissimilar weld joints between low alloy steel and duplex stainless steel’, Int. J. Miner. Metall. Mater., 2012, 19, 518–524. doi: 10.1007/s12613-012-0589-z
5.
CelikA. and AlsaranA.: ‘Mechanical and structural properties of similar and dissimilar steel joints’, Mater. Charact., 1999, 43, 311–318. doi: 10.1016/S1044-5803(99)00045-5
6.
MecoS., PardalG., GangulyS., WilliamsS and McPhersonN.: ‘Application of laser in seam welding of dissimilar steel to aluminium joints for thick structural components’, Opt. Lasers Eng., 2015, 67, 22–30. doi: 10.1016/j.optlaseng.2014.10.006
7.
BanovicS. W., DuPontJ. N. and MarderA. R.: ‘Dilution and microsegregation in dissimilar metal welds between super austenitic stainless steel and nickel base alloys’, Sci. Technol. Weld. Join., 2002, 7, 374–383. doi: 10.1179/136217102225006804
8.
JafarzadeganM., FengA. H., Abdollah-ZadehA., SaeidT., ShenJ. and AssadiH.: ‘Microstructural characterization in dissimilar friction stir welding between 304 stainless steel and st37 steel’, Mater. Charact., 2012, 74, 28–41. doi: 10.1016/j.matchar.2012.09.004
9.
LiuX., LanS. and NiJ.: ‘Analysis of process parameters effects on friction stir welding of dissimilar aluminium alloy to advanced high strength steel’, Mater. Des., 2014, 59, 50–62. doi: 10.1016/j.matdes.2014.02.003
10.
XueP., NiD. R., WangD., XiaoB. I. and MaZ. Y.: ‘Effect of friction stir welding parameters on the microstructure and mechanical properties of the dissimilar Al-Cu joints’, Mater. Sci. Eng. A, 2011, A528, 4683–4689. doi: 10.1016/j.msea.2011.02.067
11.
CoelhoR. S., KostkaA., SantosJ. F. dos and Kaysser-PyzallaA.: ‘Friction-stir dissimilar welding of aluminium alloy to high strength steels: Mechanical properties and their relation to microstructure’, Mater. Sci. Eng. A, 2012, A556, 175–183. doi: 10.1016/j.msea.2012.06.076
12.
JagadeeshaC. B.: ‘Dissimilar friction stir welding between aluminium alloy and magnesium alloy at a low rotational speed’, Mater. Sci. Eng. A, 2014, A616, 55–62. doi: 10.1016/j.msea.2014.07.090
13.
KasaiH., MorisadaY. and FujiiH.: ‘Dissimilar FSW of immiscible materials: steel/magnesium’, Mater. Sci. Eng. A, 2015, A624, 250–255. doi: 10.1016/j.msea.2014.11.060
14.
AghaeiA. and DehghaniK.: ‘Characterizations of friction stir welding of dissimilar Monel400 and stainless steel 316’, Int. J. Adv. Manuf. Technol., 2015, 77, 573–579. doi: 10.1007/s00170-014-6467-2
15.
KarlssonL., BerqvistE. L. and LarssonH.: ‘Application of friction stir welding to dissimilar welding’, Weld. World, 2002, 46, 10–14. doi: 10.1007/BF03266360
16.
GuoJ., GougeonP. and ChenX. G.: ‘Microstructure evolution and mechanical properties of dissimilar friction stir welded joints between AA1100-B4C and AA6063 alloy’, Mater. Sci. Eng. A, 2012, A553, 149–156. doi: 10.1016/j.msea.2012.06.004
17.
ShenC., ZhangJ. and GeJ.: ‘Microstructures and electrochemical behaviours of the friction stir welding dissimilar weld’, J. Environ. Sci., 2011, 23, 32–35. doi: 10.1016/S1001-0742(11)61072-3
18.
ThomasW. M., ThreadgillP. L. and NicholasE. D.: ‘Feasibility of friction stir welding steel’, Sci. Technol. Weld. Join., 1999, 4, 365–372. doi: 10.1179/136217199101538012
19.
IshidaK., GaoY., NagatsukaK., TakahashiM. and NakataK.: ‘Microstructures and mechanical properties of friction stir welded lap joints of commercially pure titanium and 304 stainless steel’, J. Alloys Compd, 2015, 630, 172–177. doi: 10.1016/j.jallcom.2015.01.004
20.
DebRoyT. and BhadeshiaH. K. D. H.: ‘Friction stir welding of dissimilar alloys—a perspective’, Sci. Technol. Weld. Join., 2010, 15, 266–270. doi: 10.1179/174329310X12726496072400
21.
RodriguezJ. and RamirezA. J.: ‘Friction stir welding of mild steel to alloy 625—development of welding parameters’, Sci. Technol. Weld. Join., 2014, 19, 343–349. doi: 10.1179/1362171814Y.0000000198
22.
HassanA. S., MahmoudT. S., MahmoudF. H. and KhalifaT. A.: ‘Friction stir welding of dissimilar A319 and A356 aluminium cast alloys’, Sci. Technol. Weld. Join., 2010, 15, 414–422. doi: 10.1179/136217110X12720264008358
23.
Jamshidi AvalH., SerajzadehS., KokabiA. H. and LoureiroA.: ‘Effect of tool geometry on mechanical and microstructural behaviours in dissimilar friction stir welding of AA 5086-AA 6061’, Sci. Technol. Weld. Join., 2011, 16, 597–604. doi: 10.1179/1362171811Y.0000000044
24.
ReynoldsA. P., TangW., Gnaupel-HeroldT. and PraskH.: Structure, properties, and residual stress of 304L stainless steel friction stir welds, Acta Mater., 2003, 48, 1289–1294.
25.
SatoY. S., NelsonT. W. and SterlingC. J.: ‘Recrystallization in type 304L stainless steel during friction stirring’, Acta Mater, 2005, 53, 637–645. doi: 10.1016/j.actamat.2004.10.017
26.
SaeidT., Abdollah-ZadehA., ShibayanagiT., IkeuchiK. and AssadiH.: ‘On the formation of grain structure during friction stir welding of duplex stainless steel’, Mater. Sci. Eng. A, 2010, A527, 6484–6488. doi: 10.1016/j.msea.2010.07.011
27.
SaeidT., Abdollah-ZadehA., AssadiH. and Malek-GhainiF.: ‘Effect of friction stir welding on the microstructure and mechanical properties of a duplex stainless steel’, Mater. Sci. Eng. A, 2008, A496, 262–268. doi: 10.1016/j.msea.2008.05.025
28.
FujiiH., CuiL., TsujiN., MaedaM., NakataK. and NogiK.: ‘Friction stir welding of carbon steels’, Mater. Sci. Eng. A, 2006, A429, 50–57. doi: 10.1016/j.msea.2006.04.118
29.
FujiiH., CuiL., NakataK. and NogiK.: ‘Mechanical properties of friction stir welded carbon steel joints—friction stir welding with and without transformation’, Weld. World, 2008, 52, 75–81. doi: 10.1007/BF03266672
30.
NandanR., DebRoyT. and BhadeshiaH. K. D. K.: ‘Recent advances in friction-stir welding—process, weldment structure and properties, Prog’, Mater. Sci., 2008, 53, 980–1023.
31.
LakshminarayananA. K., BalasurbramanianV. and SalahuddinM.: ‘Microstructure, tensile and impact toughness properties of friction stir welded mild steel’, J. Iron Steel Res. Int., 2010, 17, (10), 68–74. doi: 10.1016/S1006-706X(10)60186-0
32.
PeelM., SteuwerA., PreussM. and WithersP. J.: ‘Microstructure, mechanical properties and residual stresses as a function of welding speed in aluminium AA5083 friction stir welds’, Acta Mater., 2003, 51, 4791–4801.
33.
MishraR. S. and MaZ. Y.: ‘Friction stir welding and processing’, Mater Sci. & Eng. R, 2005, 50, 1–78. doi: 10.1016/j.mser.2005.07.001
34.
BaillieP., CampbellS. W., GallowayA. M., CarterS. R. and McPhersonN. A.: ‘Friction stir welding of 6mm thick carbon steel underwater and in air’, Sci. Technol. Weld. Join., 2015.
35.
McPhersonN. A., GallowayA. M., CarterS. R. and HamblingS. J.: ‘Friction stir welding of thin DH36 steel plate’, Sci. Technol. Weld. Join, 2013, 18, 441–450. doi: 10.1179/1362171813Y.0000000122
36.
ToumpisA., GallowayA., MolterL. and PolezhayevaH.: ‘Systematic investigation of the fatigue performance of a friction stir welded low alloy steel’, Mater. Des., 2015.
37.
British Standards Institution: BS EN ISO 4136:2012: ‘Destructive tests on welds in metallic materials—transverse tensile test’. London, UK, November..
38.
British Standards Institution: BS EN ISO 6892-1:2009: ‘Metallic materials—tensile testing. Part 1: Method of test at ambient temperature’. London, UK, August 2012..
39.
British Standards Institution: PD ISO/TR 14345:2012: ‘Fatigue—fatigue testing of welded components—guidance’. London, UK, March 2013..
40.
WangS.-G., DongG.-P. and MaQ.-H.: ‘Welding of duplex stainless steel composite plate: influence on microstructural development’, Mater. Manuf. Process., 2009, 24, 1383–1388. doi: 10.1080/10426910902997456
41.
SunZ. and KarppiR.: ‘The application of electron beam welding for the joining of dissimilar metals: an overview’, J. Mater. Process. Technol., 1996, 59, 257–267. doi: 10.1016/0924-0136(95)02150-7
42.
CaballeroF. G., ChaoJ., Garcia-MateoC., SantofimieM. J. and CapdevilaC.: ‘Toughness deterioration in advanced high strength bainitic steels’, Mater. Sci. Eng. A, 2009, A525, 87–95s. doi: 10.1016/j.msea.2009.06.034
