Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

XIE Xiaojiang; ZHOU Jianzhong; CHEN Hansong; HUANG Shu; MENG Xiankai; DAI Lei

doi:10.7510/jgjs.issn.1001-3806.2014.01.020

Volume 38 Issue 1

Dec. 2013

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Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

1.
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

Corresponding author: ZHOU Jianzhong, zhoujz@ujs.edu.cn ;
Received Date: 2013-03-15
Accepted Date: 2013-04-02

Abstract

In order to study the influence of laser shock peening on the thermal stability property of A356 Al alloy, after laser shock peening A356 Al alloy workpieces with Nd:YAG laser and annealing them at 220℃ their microstructure, micro-hardness and residual stress were studied. A series of experimental data were got. The results showed that laser shock peening can effectively improve the thermal stability of A356 Al alloys. The large residual compressive stress was induced by laser shock peening on the surface, micro-hardness and the surface dislocation density was increased significantly; the grain was refined obviously. After annealing, the residual compressive stress was decreased by 30.68%, the dislocation density (full width at half maximum) was decreased from 1.63°to 1.51°, and the micro-hardness was decreased by 19.42%, the grain size on the surface layer was grown up slightly. However, compared to the matrix, the scale was less. The results were helpful to expand application fields of laser shock peening and A356 Al alloy.
- laser technique,
- thermal stability,
- laser shock peening,
- residual compressive stress,
- dislocation density

References

[1]	ZHOU L Z, LIU S H, HUANG A G. Laser surface alloying of cast aluminum alloy with Ni and Cr[J]. Laser Technology, 2004, 28(6):565-568(in Chinese).
[2]	MAN Zh, JIAN Z Y. Effects of T6 heat treatment on the microstructure, tensile properties, and fracture behavior of the modified A356 alloys[J]. Materials and Design, 2012, 36(9):243-249.
[3]	BARADARANI B, RAISZADEH R. Precipitation hardening of cast Zr-containing A356 aluminum alloy[J]. Materials and Design, 2011, 32(2):935-940.
[4]	DOBRZANSKI L A, BOREK W, MANIARA R, et al. Influence of the crystallization condition on Al-Si-Cu casting alloys structure[J]. Materials Manufacturing Engineering, 2006, 18(1/2):211-214.
[5]	ZHANG B R, TIAN S J, WANG H Y. Effect of secondary dendrite arm and heat treatment on mechanical properties aluminum alloy engine cylinder head[J].Foundary Technology, 2009, 45(10):1367-1370(in Chinese).
[6]	HAGHSHENAS M, ZAREI-HANZAKI A, FATEMI-VARZANEH S M. The effects of thermo-mechanical parameters on the microstructure of thixo-cast A356 aluminum alloy[J]. Materials Science and Engineering, 2008, A480(8):68-74.
[7]	HWANG J Y, DOTY H W, KAUFRMAN M J. The effects of Mn additions on the microstructure and mechanical properties of Al-Si-Cu casting alloys[J]. Materials Science and Engineering, 2008, A488(10):496-504.
[8]	LIU X X, CHEN M.Study on the cylinder head design technology of small type IC engine for remanufacturing[J].Small Internal Combustion Engine and Motorcycle, 2007, 36(1):80-82(in Chinese).
[9]	SHEN L D, CHEN J F, LI X Ch, et al. Finite element analysis on residual stress field for laser shock processing AM50 magnesium alloy[J]. Laser Technology, 2012, 36(1):45-49(in Chinese).
[10]	LI Y, PEI X. Investigation on tribological behaviors of surface micro-forming 20CrNiMo steel under laser shock processing[J]. Laser Technology, 2012, 36(6):814-817(in Chinese).
[11]	YIN S M, LIU J L, ZHOU J Zh, et al. Design of laser peening CNC systems based on motion control card[J]. Laser Technology, 2012, 36(5):704-707(in Chinese).
[12]	REN X D, RUAN L, ZHAN Q B, et al. Experimental research of laser shock peening 6061-T6 aluminum alloy during elevated temperature[J]. Chinese Journal of Lasers, 2012, 39(3): 1-4(in Chinese).
[13]	ZHANG X Q, HE G D, RAO S X. Residual stress of high temperature alloy GH2036 by laser shock strengthening[J]. Heat Treatment of Metals, 2009, 34(4): 38-40(in Chinese).
[14]	LI Q P, LI Y H, HE Ch L, et al. Residual stress of laser peening processed TC17 and stress relax predication model based on support vector machines theory[J]. Journal of Aerospace Power, 2012, 27(2): 307-311(in Chinese).
[15]	NIKITIN I, SCHOLTES B.High temperature fatigue behavior and residual stress stability of laser-shock peened and deep rolled austenitic steel AISI 304[J].Scripta Materialia, 2004, 50(3):1345-1350.
[16]	PENG J H, TANG X L, HE J T. Effect of heat treatment on microstructure and tensile properties of A356 alloys[J]. Transaction of Nonferrous Metals Society of China, 2011, 21(4):1950-1956.
[17]	CACERES C H, DAVIDSON C J, GRIFFITHS J R. The defor-mation and fracture behavior of anAl-Si-Mg casting alloy[J]. Materials Science and Engineering, 1995, A197(2): 1712179.
[18]	TSAIA Y Ch, CHOUA Ch Y, LEEB S L. Effect of trace la addition on the microstructures and mechanical properties of A356 (Al-7Si-0.35Mg) aluminum alloys[J].Journal of Alloy and Compounds, 2009, 487(1/2):157-162.
[19]	LIN J P, ZHAO H S, ZHU G L, et al. Effects of minor gallium addition on microstructure and mechanical properties of A356 alloy[J].Special Casting and Nonferrous Alloys, 2009, 29(10):957-960(in Chinese).
[20]	NU J Z. Investigation of laser shock processing on the mechanical properties and micro-plastic deformation mechanism of LY2 aluminum alloy[D].Zhenjiang: Jiangsu University, 2010:66-86(in Chinese).

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

Corresponding author: ZHOU Jianzhong, zhoujz@ujs.edu.cn;

1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

Received Date: 2013-03-15

Accepted Date: 2013-04-02

Available Online: 2014-01-25

Abstract: In order to study the influence of laser shock peening on the thermal stability property of A356 Al alloy, after laser shock peening A356 Al alloy workpieces with Nd:YAG laser and annealing them at 220℃ their microstructure, micro-hardness and residual stress were studied. A series of experimental data were got. The results showed that laser shock peening can effectively improve the thermal stability of A356 Al alloys. The large residual compressive stress was induced by laser shock peening on the surface, micro-hardness and the surface dislocation density was increased significantly; the grain was refined obviously. After annealing, the residual compressive stress was decreased by 30.68%, the dislocation density (full width at half maximum) was decreased from 1.63°to 1.51°, and the micro-hardness was decreased by 19.42%, the grain size on the surface layer was grown up slightly. However, compared to the matrix, the scale was less. The results were helpful to expand application fields of laser shock peening and A356 Al alloy.

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Reference (20)

[1]	ZHOU L Z, LIU S H, HUANG A G. Laser surface alloying of cast aluminum alloy with Ni and Cr[J]. Laser Technology, 2004, 28(6):565-568(in Chinese).
[2]	MAN Zh, JIAN Z Y. Effects of T6 heat treatment on the microstructure, tensile properties, and fracture behavior of the modified A356 alloys[J]. Materials and Design, 2012, 36(9):243-249.
[3]	BARADARANI B, RAISZADEH R. Precipitation hardening of cast Zr-containing A356 aluminum alloy[J]. Materials and Design, 2011, 32(2):935-940.
[4]	DOBRZANSKI L A, BOREK W, MANIARA R, et al. Influence of the crystallization condition on Al-Si-Cu casting alloys structure[J]. Materials Manufacturing Engineering, 2006, 18(1/2):211-214.
[5]	ZHANG B R, TIAN S J, WANG H Y. Effect of secondary dendrite arm and heat treatment on mechanical properties aluminum alloy engine cylinder head[J].Foundary Technology, 2009, 45(10):1367-1370(in Chinese).
[6]	HAGHSHENAS M, ZAREI-HANZAKI A, FATEMI-VARZANEH S M. The effects of thermo-mechanical parameters on the microstructure of thixo-cast A356 aluminum alloy[J]. Materials Science and Engineering, 2008, A480(8):68-74.
[7]	HWANG J Y, DOTY H W, KAUFRMAN M J. The effects of Mn additions on the microstructure and mechanical properties of Al-Si-Cu casting alloys[J]. Materials Science and Engineering, 2008, A488(10):496-504.
[8]	LIU X X, CHEN M.Study on the cylinder head design technology of small type IC engine for remanufacturing[J].Small Internal Combustion Engine and Motorcycle, 2007, 36(1):80-82(in Chinese).
[9]	SHEN L D, CHEN J F, LI X Ch, et al. Finite element analysis on residual stress field for laser shock processing AM50 magnesium alloy[J]. Laser Technology, 2012, 36(1):45-49(in Chinese).
[10]	LI Y, PEI X. Investigation on tribological behaviors of surface micro-forming 20CrNiMo steel under laser shock processing[J]. Laser Technology, 2012, 36(6):814-817(in Chinese).
[11]	YIN S M, LIU J L, ZHOU J Zh, et al. Design of laser peening CNC systems based on motion control card[J]. Laser Technology, 2012, 36(5):704-707(in Chinese).
[12]	REN X D, RUAN L, ZHAN Q B, et al. Experimental research of laser shock peening 6061-T6 aluminum alloy during elevated temperature[J]. Chinese Journal of Lasers, 2012, 39(3): 1-4(in Chinese).
[13]	ZHANG X Q, HE G D, RAO S X. Residual stress of high temperature alloy GH2036 by laser shock strengthening[J]. Heat Treatment of Metals, 2009, 34(4): 38-40(in Chinese).
[14]	LI Q P, LI Y H, HE Ch L, et al. Residual stress of laser peening processed TC17 and stress relax predication model based on support vector machines theory[J]. Journal of Aerospace Power, 2012, 27(2): 307-311(in Chinese).
[15]	NIKITIN I, SCHOLTES B.High temperature fatigue behavior and residual stress stability of laser-shock peened and deep rolled austenitic steel AISI 304[J].Scripta Materialia, 2004, 50(3):1345-1350.
[16]	PENG J H, TANG X L, HE J T. Effect of heat treatment on microstructure and tensile properties of A356 alloys[J]. Transaction of Nonferrous Metals Society of China, 2011, 21(4):1950-1956.
[17]	CACERES C H, DAVIDSON C J, GRIFFITHS J R. The defor-mation and fracture behavior of anAl-Si-Mg casting alloy[J]. Materials Science and Engineering, 1995, A197(2): 1712179.
[18]	TSAIA Y Ch, CHOUA Ch Y, LEEB S L. Effect of trace la addition on the microstructures and mechanical properties of A356 (Al-7Si-0.35Mg) aluminum alloys[J].Journal of Alloy and Compounds, 2009, 487(1/2):157-162.
[19]	LIN J P, ZHAO H S, ZHU G L, et al. Effects of minor gallium addition on microstructure and mechanical properties of A356 alloy[J].Special Casting and Nonferrous Alloys, 2009, 29(10):957-960(in Chinese).
[20]	NU J Z. Investigation of laser shock processing on the mechanical properties and micro-plastic deformation mechanism of LY2 aluminum alloy[D].Zhenjiang: Jiangsu University, 2010:66-86(in Chinese).

Experimental study on thermal stability of A356 Al alloy treated by laser shock peening

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views