Influence of Cold Sprayed Aluminum Coating on the Mechanical Properties of Friction Stir Welded 2024 Aluminum Alloy Joints

doi:10.3901/JME.2015.22.042

Abstract

Abstract: Cold sprayed aluminum coatings enhanced obviously the corrosion resistance of friction stir welding(FSW) joints, but the influence of cold sprayed Al coatings on the mechanical properties of FSW joints is still unclear. The effect of cold sprayed Al coatings on the mechanical properties of FSW joints is investigated by tensile tests and fatigue tests. Microstructure change of FSW joints before and after cold spraying is also examined by transmission electron microscope(TEM) and differential scanning calorimetry(DSC). Results show that the mechanical properties of the FSW AA2024-T3 joints are improved after cold spraying. Tensile strength and elongation of coated specimen increase by about 27 MPa and 60.5%, respectively, compared to those of 393.3 MPa and 4.3% of as-welded specimen. When the fatigue life is 1×107 cycles, the fatigue strength corresponding to a 50% survival probability of coated specimens is 29.1% higher than that of the as-welded specimen, and the fatigue strength corresponding to a 95% survival probability of coated specimens is 30.9% higher than that of the as-welded specimens. After cold spraying, the volume fractions of S phase and Guinier-Preston-Bagaryatskii(GBP) zone in nugget zone increases, which is possibly a main reason for the improvement of the mechanical properties.

Key words: aluminum alloy, cold spraying, friction stir welding, mechanical properties

ZHANG Zhihan, JIANG Ruorong, LI Wenya. Influence of Cold Sprayed Aluminum Coating on the Mechanical Properties of Friction Stir Welded 2024 Aluminum Alloy Joints[J]. Journal of Mechanical Engineering, 2015, 51(22): 42-46.

Add to citation manager EndNote|Reference Manager|ProCite|BibTeX|RefWorks

URL: http://www.cjmenet.com.cn/EN/10.3901/JME.2015.22.042

http://www.cjmenet.com.cn/EN/Y2015/V51/I22/42

References

[1] MISHRA R S，MA Z Y. Friction stir welding and processing[J]. Materials Science and Engineering：R，Reports，2005，50(1)：1-78.
[2] 张昭，陈金涛，王晋宝，等. 基于仿真的搅拌摩擦焊连接AA2024-T3不同板厚过程对比[J]. 机械工程学报，2011，47(18)：23-27.ZHANG Zhao，CHEN Jintao，WANG Jinbao，et al. Simulation based comparison of friction stir welding of AA2024-T3 plates with different thicknesses[J]. Journal of Mechanical Engineering，2011，47(18)：23-27.
[3] 石磊，武传松，刘会杰. 逆向差速搅拌摩擦焊接材料塑性流变和热场的数值模拟[J]. 机械工程学报，2014，50(16)：140-146.SHI Lei，WU Chuansong，LIU Huijie. Modeling material plastic flow and thermal field in reverse dual-rotation friction stir welding[J]. Journal of Mechanical Engineering，2014，50(16)：140-146.
[4] 张昭，吴奇. 基于材料流动轨迹的搅拌摩擦焊接晶粒及焊接区大小预测模型[J]. 机械工程学报，2015，52(2)：43-48.
ZHANG Zhao，WU Qi. Computational model for predictions on welding zones and grain sizes based on the flow trace in friction stir welding[J]. Journal of Mechanical Engineering，2015，52(2)：43-48.
[5] 邵青，何宇廷，张腾，等. 铝合金搅拌摩擦焊接加筋板剪切稳定性能研究[J]. 机械工程学报，2014，50(20)：93-99.
SHAO Qing，HE Yuting，ZHANG Teng，et al. Study on stability performance of friction stir welded aluminum alloy stiffened panel under shear load[J]. Journal of Mechanical Engineering，2014，50(20)：93-99.
[6] PAGLIA C S，BUCHHEIT R G. A look in the corrosion of aluminum alloy friction stir welds[J]. Scripta Materialia，2008，58：383-387.
[7] WADESON D A， ZHOU X，THOMPSON G E，et al. Corrosion behaviour of friction stir welded AA7108 T79 aluminium alloy[J]. Corrosion Science，2006，48(4)：887-897.
[8] SAMAR J K. Microstructure and corrosion properties of diode laser melted friction stir weld of aluminum alloy 2024-t351[J]. Applied Surface Science，2011，257(9)：3985-3997.
[9] PRASAD R K， JANAKI R G D， STUCKER B E. Improvement in corrosion resistance of friction stir welded aluminum alloys with micro-arc oxidation coatings[J]. Scripta Materialia，2008，58(11)：998-1001.
[10] JARIYABOON M，DAVENPORT A J，AMBAT R，et al. Effect of cryogenic cooling on corrosion of friction stir welded AA7010-T7651[J]. Anti-Corrosion Methods and Materials，2010，57(2)：83-89.
[11] PAGLIA C S，JATA K V，BUCHHEIT R G. The influence of artificial aging on the microstructure, mechanical properties，corrosion，and environmental cracking susceptibility of a 7075 friction-stir-weld[J]. Materials and Corrosion，2007，58(10)：737-750.
[12] 张利国，姬书得，邹爱丽，等. 焊接工艺参数对5383铝合金搅拌摩擦焊接头耐腐蚀性的影响[J]. 机械工程学报，2011，47(2)：80-84.
ZHANG Liguo，JI Shude，ZOU Aili，et al. Effect of welding parameters on corrosion resistance of 5383 al alloy friction stir welding joint[J]. Journal of Mechanical Engineering，2011，47(2)：80-84.
[13] PAPYRIN A. Cold spray technology[J]. Advanced Materials and Processes，2001，159(9)：49-51.
[14] 李海祥，孙明先，李相波，等. 冷喷涂65%Zn-Al复合涂层的沉积特性[J]. 中国有色金属报，2010，20(7)：1354-1359.
LI Haixiang，SUN Mingxian，LI Xiangbo，et al. Depositing characteristic of 65% Zn-Al coating produced by cold gas dynamic spray[J]. The Chinese Journal of Nonferrous Metals，2010，20(7)：1354-1359.
[15] SPENCER K，FABIJANIC D M，ZHANG M X. The use of Al-Al2O3 cold spray coatings to improve the surface properties of magnesium alloys[J]. Surface and Coatings Technology，2009，204(3)：336-344.
[16] 郑修麟，王泓，鄢君辉，等. 材料疲劳理论与工程应用[M]. 北京：科学出版社，2013.
ZHENG Xiulin，WANG Hong，YAN Junhui，et al. Materials fatigue theory and engineering applications[M]. Beijing：Science Press，2013.
[17] LIU H J，FUJII H，MAEDA M，et al. Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminum alloy[J]. Journal of Materials Processing Technology，2003，142：692-696.
[18] AYDIN H，BAYRAM A，U?UZ A，et al. Tensile properties of friction stir welded joints of 2024 aluminum alloys in different heat-treated-state[J]. Materials and Design，2009，30(6)：2211-2221.
[19] ZHANG Z，XIAO B L，MA Z Y. Hardness recovery mechanism in the heat-affected zone during long-term natural aging and its influence on the mechanical properties and fracture behavior of friction stir welded 2024al-t351 joints[J]. Acta Materialia，2014，73：227-239.
[20] LI W Y，YIN S，GUO X，et al. An investigation on temperature distribution within the substrate and nozzle wall in cold spraying by numerical and experimental methods[J]. Journal of Thermal Spray Technology，2012，21(1)：41-48.