T9I6断续时效对2219铝合金组织和力学性能的影响
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摘要
采用维氏硬度测试、室温拉伸测试、扫描电镜(SEM)以及透射电镜(TEM)等分析方法研究了T9I6断续时效工艺对2219铝合金组织和力学性能的影响。结果表明:2219铝合金T9I6峰值时效的抗拉强度、屈服强度、伸长率分别为490 MPa、385 MPa、12.4%,与T852峰值时效相比,分别提高了9.9%、15.3%、6.0%;这主要是由于在T9I6断续时效中,第二级低温长时的时效会促进析出细小弥散的GP区,经第三级时效得到均匀细小的θ′相。
Effects of T9 I6 interrupted aging on microstructure and mechanical properties of 2219 aluminum alloy were studied by means of Vickers hardness test, room temperature tensile test, scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that the tensile strength, yield strength and elongation of the 2219 aluminum alloy after T9 I6 peak aging are 492.22 MPa, 376.83 MPa and 12.28%, respectively, compared with the T852 peak aging, which increase by 10.48%, 12.92% and 5.14%, respectively. This is mainly due to the fact that in the process of T9 I6 interrupted aging, the aging of the second stage at low temperature for a long time will promote the precipitation of small dispersed Guinier Preston(GP) zone, and the uniformly and fine θ′ phase can be obtained in the third stage aging.
Effects of T9 I6 interrupted aging on microstructure and mechanical properties of 2219 aluminum alloy were studied by means of Vickers hardness test, room temperature tensile test, scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that the tensile strength, yield strength and elongation of the 2219 aluminum alloy after T9 I6 peak aging are 492.22 MPa, 376.83 MPa and 12.28%, respectively, compared with the T852 peak aging, which increase by 10.48%, 12.92% and 5.14%, respectively. This is mainly due to the fact that in the process of T9 I6 interrupted aging, the aging of the second stage at low temperature for a long time will promote the precipitation of small dispersed Guinier Preston(GP) zone, and the uniformly and fine θ′ phase can be obtained in the third stage aging.
引文
[1] 马征.冷变形及时效对2219铝合金组织性能的影响规律[D].哈尔滨:哈尔滨工业大学,2014.MA Zheng.Influence of cold deformation and aging on microstructure and properties of aluminum alloy 2219[D].Harbin:Harbin Institute of Technology,2014.
[2] 黄元春,王也君,肖郑兵,等.再时效处理对2219-T6铝合金叉形环显微组织和力学性能的影响[J].中国有色金属学报,2016,26(7):1365-1371.HUANG Yuan-chun,WANG Ye-jun,XIAO Zheng-bing,et al.Effect of re-aging treatment on microstructure and mechanical properties of 2219-T6 aluminum alloy forked ring[J].The Chinese Journal of Nonferrous Metals,2016,26(7):1365-1371.
[3] 周蓉蓉,贺爱国,方华婵,等.预变形量对2219铝合金的力学性能及显微组织影响[J].材料热处理学报,2016,37(4):45-49.ZHOU Rong-rong,HE Ai-guo,FANG Hua-chan,et al.Effects of pre-deformation on microstructure and mechanical properties of 2219 aluminum alloy[J].Transactions of Materials and Heat Treatment,2016,37(4):45-49.
[4] Massalski T B.The Al-Cu (aluminum-copper) system[J].Journal of Phase Equilibria,1980,1(1):27-33.
[5] An L H,Cai Y,Liu W,et al.Effect of pre-deformation on microstructure and mechanical properties of 2219 aluminum alloy sheet by thermomechanical treatment[J].Transactions of Nonferrous Metals Society of China,2012,22(2):370-375.
[6] 陈运强,陈康华,陈送义,等.冷变形对2219铝合金环轧件组织和力学性能的影响[J].材料科学,2016,6(3):197-206.CHEN Yun-qiang,CHEN Kang-hua,CHEN Song-yi,et al.Effect of cold-deformation on mechanical property and microstructure of 2219 aluminum alloy ring rolled pieces[J].Material Sciences,2016,6(3):197-206.
[7] Elgalladn E M,Zhang Z,Chen X G.Effect of two-step aging on the mechanical properties of AA2219 DC cast alloy[J].Materials Science and Engineering A,2015,625(12):213-220
[8] Lumley R N,Morton A J,Polmear I J.Enhanced creep performance in an Al-Cu-Mg-Ag alloy through underageing[J].Acta Materialia,2002,50(14):3597-3608
[9] Lumley R N,Polmear I J,Morton A J.Temper developments using secondary ageing[C]//NIE J F,MORTON A J,MUDDLE B C.Proceedings of the 9th International Conference on Aluminum Alloys.Brisbane,Australia:Institute of Materials Engineering Australasia Ltd,2004:85-95.
[10] 尹美杰,陈江华,刘春辉.终端时效处理对AA2024铝合金力学性能和显微结构的影响[J].中国有色金属学报,2015,25(12):3271-3281.YIN Mei-jie,CHEN Jiang-hua,LIU Chun-hui.Effect of interrupted ageing on mechanical property and microstructure of AA2024 alloy[J].The Chinese Journal of Nonferrous Metals,2015,25(12):3271-3281.
[11] 刘平礼,张健,李劲风,等.二次时效对微合金化的Al-Cu-Li微观组织及力学性能的影响[J].宇航材料工艺,2014,44(5):50-55.LIU Ping-li,ZHANG Jian,LI Jing-feng,et al.Effect of secondary aging on micro-structure and mechanical properties of micro-alloyed Al-Cu-Li alloy[J].Aerospace Materials and Technology,2014,44(5):50-55.
[12] Gu G,Ye J P,Jiang H C et al.Effects of T9I6 thermo-mechanical process on microstructure,mechanical properties and ballistic resistance of 2519A aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2017,24(7):2295-2300.
[13] Karlik M,Jouffry B.High resolution electron microscopy of Guinier-Preston(G.P.I) zones in an Al-Cu based alloys[J].Acta Materialia,1997,45(8):3251-3263.
[14] Takedal M,Maedal Y,Yoshidal T,et al.Discontinuity of G.P.(I) zone and θ′ phase in all AI-Cu alloy[J].Scripta Materialia,1999,41(6):643-649.
[15] Ber L B.Accelerated artificial ageing regimes of commercial aluminum alloys[J].Materials Science and Engineering A,2000,280(1):91-96.
[16] 张新明,贾寓真,刘玲,等.冷轧预变形对2519A铝合金时效析出的影响[J].中南大学学报:自然科学版,2011,42(1):46-49.ZHANG Xin-ming,JIA Yu-zhen,LIU Ling,et al.Effects of cold-pre-rolling reduction on precipitation of 2519A aluminum alloy plate[J].Journal of Central South University:Science and Technology,2011,42(1):46-49
[17] 张新明,贾寓真,刘玲,等.冷轧预变形对 2519A 铝合金组织与性能的影响[J].中国有色金属学报,2010,20(6):1088-1097.ZHANG Xin-ming,JIA Yu-zhen,LIU Ling,et al.Effect of cold rolling pre deformation on microstructure and properties of 2519A aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(6):1088-1097.
[18] Preston G D.Structure of age-hardened aluminium-copper alloys[J].Nature,1938,142(3595):569-570.
[19] 李松瑞,周善初.金属热处理[M].长沙:中南大学出版社,2005:198-202.
[20] Wyss R K,Sanders R E.Microstructure-property relationship in a 2xxx aluminum alloy with mg addition[J].Metallurgical Transactions A,1988,19(10):2523-2530.
[2] 黄元春,王也君,肖郑兵,等.再时效处理对2219-T6铝合金叉形环显微组织和力学性能的影响[J].中国有色金属学报,2016,26(7):1365-1371.HUANG Yuan-chun,WANG Ye-jun,XIAO Zheng-bing,et al.Effect of re-aging treatment on microstructure and mechanical properties of 2219-T6 aluminum alloy forked ring[J].The Chinese Journal of Nonferrous Metals,2016,26(7):1365-1371.
[3] 周蓉蓉,贺爱国,方华婵,等.预变形量对2219铝合金的力学性能及显微组织影响[J].材料热处理学报,2016,37(4):45-49.ZHOU Rong-rong,HE Ai-guo,FANG Hua-chan,et al.Effects of pre-deformation on microstructure and mechanical properties of 2219 aluminum alloy[J].Transactions of Materials and Heat Treatment,2016,37(4):45-49.
[4] Massalski T B.The Al-Cu (aluminum-copper) system[J].Journal of Phase Equilibria,1980,1(1):27-33.
[5] An L H,Cai Y,Liu W,et al.Effect of pre-deformation on microstructure and mechanical properties of 2219 aluminum alloy sheet by thermomechanical treatment[J].Transactions of Nonferrous Metals Society of China,2012,22(2):370-375.
[6] 陈运强,陈康华,陈送义,等.冷变形对2219铝合金环轧件组织和力学性能的影响[J].材料科学,2016,6(3):197-206.CHEN Yun-qiang,CHEN Kang-hua,CHEN Song-yi,et al.Effect of cold-deformation on mechanical property and microstructure of 2219 aluminum alloy ring rolled pieces[J].Material Sciences,2016,6(3):197-206.
[7] Elgalladn E M,Zhang Z,Chen X G.Effect of two-step aging on the mechanical properties of AA2219 DC cast alloy[J].Materials Science and Engineering A,2015,625(12):213-220
[8] Lumley R N,Morton A J,Polmear I J.Enhanced creep performance in an Al-Cu-Mg-Ag alloy through underageing[J].Acta Materialia,2002,50(14):3597-3608
[9] Lumley R N,Polmear I J,Morton A J.Temper developments using secondary ageing[C]//NIE J F,MORTON A J,MUDDLE B C.Proceedings of the 9th International Conference on Aluminum Alloys.Brisbane,Australia:Institute of Materials Engineering Australasia Ltd,2004:85-95.
[10] 尹美杰,陈江华,刘春辉.终端时效处理对AA2024铝合金力学性能和显微结构的影响[J].中国有色金属学报,2015,25(12):3271-3281.YIN Mei-jie,CHEN Jiang-hua,LIU Chun-hui.Effect of interrupted ageing on mechanical property and microstructure of AA2024 alloy[J].The Chinese Journal of Nonferrous Metals,2015,25(12):3271-3281.
[11] 刘平礼,张健,李劲风,等.二次时效对微合金化的Al-Cu-Li微观组织及力学性能的影响[J].宇航材料工艺,2014,44(5):50-55.LIU Ping-li,ZHANG Jian,LI Jing-feng,et al.Effect of secondary aging on micro-structure and mechanical properties of micro-alloyed Al-Cu-Li alloy[J].Aerospace Materials and Technology,2014,44(5):50-55.
[12] Gu G,Ye J P,Jiang H C et al.Effects of T9I6 thermo-mechanical process on microstructure,mechanical properties and ballistic resistance of 2519A aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2017,24(7):2295-2300.
[13] Karlik M,Jouffry B.High resolution electron microscopy of Guinier-Preston(G.P.I) zones in an Al-Cu based alloys[J].Acta Materialia,1997,45(8):3251-3263.
[14] Takedal M,Maedal Y,Yoshidal T,et al.Discontinuity of G.P.(I) zone and θ′ phase in all AI-Cu alloy[J].Scripta Materialia,1999,41(6):643-649.
[15] Ber L B.Accelerated artificial ageing regimes of commercial aluminum alloys[J].Materials Science and Engineering A,2000,280(1):91-96.
[16] 张新明,贾寓真,刘玲,等.冷轧预变形对2519A铝合金时效析出的影响[J].中南大学学报:自然科学版,2011,42(1):46-49.ZHANG Xin-ming,JIA Yu-zhen,LIU Ling,et al.Effects of cold-pre-rolling reduction on precipitation of 2519A aluminum alloy plate[J].Journal of Central South University:Science and Technology,2011,42(1):46-49
[17] 张新明,贾寓真,刘玲,等.冷轧预变形对 2519A 铝合金组织与性能的影响[J].中国有色金属学报,2010,20(6):1088-1097.ZHANG Xin-ming,JIA Yu-zhen,LIU Ling,et al.Effect of cold rolling pre deformation on microstructure and properties of 2519A aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(6):1088-1097.
[18] Preston G D.Structure of age-hardened aluminium-copper alloys[J].Nature,1938,142(3595):569-570.
[19] 李松瑞,周善初.金属热处理[M].长沙:中南大学出版社,2005:198-202.
[20] Wyss R K,Sanders R E.Microstructure-property relationship in a 2xxx aluminum alloy with mg addition[J].Metallurgical Transactions A,1988,19(10):2523-2530.