激光冲击喷丸对2195铝锂合金组织结构及抗应力腐蚀性能的影响
|
摘要
研究了激光冲击喷丸(LSP)对2195铝锂合金组织结构及抗应力腐蚀性能的影响。研究结果表明激光冲击处理后,2195铝锂合金表层晶粒细化到纳米量级,多次冲击能使表层晶粒进一步细化。残余应力测试结果表明激光冲击喷丸能够引入残余压应力,多次冲击后残余压应力数值更大。此外,应力腐蚀实验结果表明激光冲击喷丸能够有效提升2195铝锂合金的抗应力腐蚀性能。在应力腐蚀环境中,激光冲击喷丸诱生的表层残余压应力和晶粒细化层能够阻碍裂纹的萌生和扩展,防止应力腐蚀断裂。
The effect of the laser shock peening(LSP) on microstructure and the stress corrosion resistance of 2195 Al-Li alloy was researched in the paper. The results show that the surface grain of 2195 Al-Li alloy is refined to nanometer level after laser shock treatment, and the surface grain can be further refined after repeated shocks. The results of residual stress test show that the residual compressive stress can be induced by laser impact shot-peening, and the residual compressive stress is larger after repeated shocks. In addition, the stress corrosion test results show that the laser impact shot peening can effectively improve the stress corrosion resistance of2195 Al-Li alloy. In the stress corrosion environment, the surface residual compressive stress induced by laser shock shot-peening and the grain refinement layer can prevent the initiation and propagation of cracks and prevent the stress corrosion cracking.
The effect of the laser shock peening(LSP) on microstructure and the stress corrosion resistance of 2195 Al-Li alloy was researched in the paper. The results show that the surface grain of 2195 Al-Li alloy is refined to nanometer level after laser shock treatment, and the surface grain can be further refined after repeated shocks. The results of residual stress test show that the residual compressive stress can be induced by laser impact shot-peening, and the residual compressive stress is larger after repeated shocks. In addition, the stress corrosion test results show that the laser impact shot peening can effectively improve the stress corrosion resistance of2195 Al-Li alloy. In the stress corrosion environment, the surface residual compressive stress induced by laser shock shot-peening and the grain refinement layer can prevent the initiation and propagation of cracks and prevent the stress corrosion cracking.
引文
[1] B.S. Yilbas, S.Z. Shuja, A. Arif, M.A. Gondal. Lasershock processing of steel[J]. J Mater Process Technol,2003,35:6-17
[2] LIAO YiLiang,YE Chang,CHENG Cary J.The mechanisms of thermal engineered laser shock peeningfor enhanced fatigue performance[J].Acta Materialia,2012(60):4997-5009
[3] X.F. NIE,W.F. HE,S.L. ZANG, X.D WANG,J. ZHAO.Effect study and application to improve high cycle fatigue resistance of TC11 titanium alloy by laser shock peening with multiple impacts[J]. Surf Coat Tech. 2014,253:68-75
[4] J.Z. LU, K.Y. LUO, Y.K. ZHANG. Grain refinement of LY2 aluminum alloy induced by ultra-high plastic strain during multiple laser shock processing impacts[J]. Acta Materialia,2010,58:3984-3994
[5] K. LU, J. LV. Surface nanocrystallization of metallic materials-presentation of concept being a new approach[J].J Mater Sci Technol,1999,15:193-196
[6] Z.M. LU,L.M. SHI,S.J. ZHU,et al. Effect of high energy shot peening pressures on stress corrosion cracking of the welded joint of 304 austenitic stainless steel[J]. Mater. Sci.Eng. A,2015,637:170-174
[7] M. B. Kannan,W. Dietzel,R. Zeng,R. Zettler. A study on the SCC susceptibility of friction stir welded AZ31 Mg sheet[J]. Mater. Sci. Eng. A,2007,243:460-461
[8] S.M. Charles,W. TAO,YE. LIN,et al. Laser shock processing and its effects on microstructure and properties of metal alloys:a review[J]. Int J Fatigue,2012,24(2):1021-1036
[9] Y. YANG, H. ZHANG, H.C. QIAO, Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing[J].Alloys Compd,2017,722:509-516
[10] G.T. Gray. High-strain-rate deformation:mechanical behavior and deformation substructures induced[J].Mater Res,2012,42:285-303
[2] LIAO YiLiang,YE Chang,CHENG Cary J.The mechanisms of thermal engineered laser shock peeningfor enhanced fatigue performance[J].Acta Materialia,2012(60):4997-5009
[3] X.F. NIE,W.F. HE,S.L. ZANG, X.D WANG,J. ZHAO.Effect study and application to improve high cycle fatigue resistance of TC11 titanium alloy by laser shock peening with multiple impacts[J]. Surf Coat Tech. 2014,253:68-75
[4] J.Z. LU, K.Y. LUO, Y.K. ZHANG. Grain refinement of LY2 aluminum alloy induced by ultra-high plastic strain during multiple laser shock processing impacts[J]. Acta Materialia,2010,58:3984-3994
[5] K. LU, J. LV. Surface nanocrystallization of metallic materials-presentation of concept being a new approach[J].J Mater Sci Technol,1999,15:193-196
[6] Z.M. LU,L.M. SHI,S.J. ZHU,et al. Effect of high energy shot peening pressures on stress corrosion cracking of the welded joint of 304 austenitic stainless steel[J]. Mater. Sci.Eng. A,2015,637:170-174
[7] M. B. Kannan,W. Dietzel,R. Zeng,R. Zettler. A study on the SCC susceptibility of friction stir welded AZ31 Mg sheet[J]. Mater. Sci. Eng. A,2007,243:460-461
[8] S.M. Charles,W. TAO,YE. LIN,et al. Laser shock processing and its effects on microstructure and properties of metal alloys:a review[J]. Int J Fatigue,2012,24(2):1021-1036
[9] Y. YANG, H. ZHANG, H.C. QIAO, Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing[J].Alloys Compd,2017,722:509-516
[10] G.T. Gray. High-strain-rate deformation:mechanical behavior and deformation substructures induced[J].Mater Res,2012,42:285-303