Correlation between microstructural features and tensile strength for friction welded joints of AA-7005 aluminum alloy

Abstract

Similar friction welded joints of AA-7005 aluminum rods were fabricated using different combinations of process parameters such as friction pressure (1.0, 1.5 and 2.0 MPa) and friction time (10, 15 and 20 s). Interfacial microstructure and formation of intermetallic compounds at the joint interface were evaluated via scanning electron microscopy (SEM) equipped with energy dispersive spectrum (EDS), and optical microscopy (OM). Microstructural observations reveal the formation of intermetallic phases during the welding process which cannot be extruded from the interface. Theses phases influence the tensile strength of the resultant joints. From the tensile characteristics viewpoint, the greatest tensile strength value of 365 MPa is obtained at 1.5 MPa and 15 s. Finally, the role of microstructural features on tensile strength of resultant joints is discussed.

Keywords

friction welding / AA-7005 aluminum alloy / microstructure / intermetallics / tensile strength

References

[1] AzimiA, FallahdoostH, NejadseyfiO. Microstructure, mechanical and tribological behavior of hot-pressed mechanically alloyed Al-Zn-Mg-Cu powders [J].. Materials and Design, 2015, 75: 1-8

[2] PalanivelR, MathewsP K, MuruganN. Optimization of process parameters to maximize ultimate tensile strength of friction stir welded dissimilar aluminum alloys using response surface methodology [J].. Journal of Central South University, 2013, 20: 2929-2938

[3] MishraR S, MaZ Y. Friction stir welding and processing [J].. Materials Science and Engineering R: Reports, 2005, 50: 1-78

[4] GholamiS, EmadoddinE, TajallyM, BorhaniE. Friction stir processing of 7075 aluminum alloy and subsequent aging treatment [J].. Transactions of Nonferrous Metals Society of China, 2015, 19: 2847-2855

[5] LiD, YangX, CuiL, HeF, ZhangX. Investigation of stationary shoulder friction stir welding of aluminum alloy 7075-T651 [J].. Journal of Materials Processing Technology, 2015, 222: 391-398

[6] MercanS, AydinS, OzdemirN. Effect of welding parameters on the fatigue properties of dissimilar AISI 2205-AISI 1020 joined by friction welding [J].. International Journal of Fatigue, 2015, 81: 78-90

[7] HakanA, MehmetT, AdemK. Effect of friction pressure on the properties of friction welded MA956 iron based super alloy [J].. Materials and Design, 2007, 28: 948-953

[8] SahinM. Joining of aluminum and copper materials with friction welding [J].. Advanced Manufacturing Technology, 2010, 49: 527-534

[9] SahinM. Joining of stainless-steel and aluminum materials by friction welding [J].. The International Journal of Advanced Manufacturing Technology, 2009, 41: 487-497

[10] OzdemirN, SarsylmazF, HascalykA. Effect of rotational speed on the interface properties of friction-welded AISI 304L to 4340 steel [J].. Materials and Design, 2007, 28: 301-307

[11] SahinM. Evaluation of the joint-interface properties of austenitic-stainless steels (AISI 304) joined by friction welding [J].. Materials and Design, 2007, 28: 2244-2250

[12] KalucE, TabanE. Study of weld zone of friction welded C45/1.3344PM dissimilar steel joints [C]//. International Conference on Design, Fabrication and Economy of Welded Structures, 2008469-475

[13] ChanderaG S, ReddyG M, RaoA V. Influence of rotational speed on microstructure and mechanical properties of dissimilar metal AISI 304-AISI 4140 continuous drive friction welds [J].. Journal of Iron and Steel Research, International, 2012, 19: 64-73

[14] FauziM N A, UdayM B, ZuhailawatiH, IsmailA B. Microstructure and mechanical properties of alumina-6061 aluminum alloy joined by friction welding [J].. Materials and Design, 2010, 31: 670-676

[15] AvinashM, ChaitanyaV K, DhananjayK G, SaralaU, MuralidharaB K. Microstructure and mechanical behavior of rotary friction welded titanium alloys [J].. Proceedings of World Academy of Science, Engineering and Technology, 2007, 1: 124-126

[16] DebroyT, BhadeshiaH K D H. Friction stir welding of dissimilar alloys-a perspective [J].. Science and Technology of Welding and Joining, 2010, 15: 266-270

[17] MaZ Y, MishraR S. Development of ultrafine-grained microstructure and low temperature (0.48Tm) superplasticity in friction stir processed Al-Mg-Zr [J].. Scripta Materialia, 2005, 53: 75-80

[18] SharmaC, DwivediD K, KumarP. Effect of welding parameters on microstructure and mechanical properties of friction stir welded joints of AA7039 aluminum alloy [J].. Materials and Design, 2012, 36: 379-390