热处理对ARB制备6063Al/MB2多层结构复合材料组织和性能的影响
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摘要
采用累积复合轧制技术制备6063Al/MB2多层结构复合材料,利用电子拉伸机、光学显微镜、扫描电镜研究了热处理对不同轧制道次6063Al/MB2多层结构复合材料的组织、性能和界面的影响。结果表明,ARB技术能够有效细化MB2层金属组织;试样在180℃热处理后,晶粒没有明显变化;320℃热处理后,晶粒明显长大;在220℃以下热处理,复合材料的抗拉强度比未经热处理态略有上升;在220℃以上热处理,抗拉强度随温度的升高而逐渐下降;在低温下退火,复合材料的剪切强度相比轧制后略有增加。随着温度的升高,扩散层厚度增加,有脆性金属间化合物生成,导致剪切强度下降。
Accumulative roll bonding( ARB) was used to combine 6063 Al and MB2 Mg alloy sheets to produce an 6063 Al / MB2 cladding material sheet with multi-layer structure. The influence of annealing on micro-structure,mechanical properties and bonding interface of6063 Al / MB2 cladding material after different ARB passes was investigated by electronic tensile machine,OM and SEM. The results show that ARB technology can effectively refine the grain size of MB2 layer. After annealing at 180 ℃,the grain size of the sample is not obvious changed,but obvious grows above 320 ℃. Under annealing at 220 ℃,the tensile strength increases slightly than unannealed,but annealing above 220 ℃,the tensile strength decreases with annealing temperature increasing. Compared the samples of annealing and unannealed,the shear strength of the cladding material after annealing at low temperature increases slightly. With annealing temperature increasing,the thickness of diffusion layer increases,and the brittle inter-metallic created,and the shear strength of cladding material decreases.
Accumulative roll bonding( ARB) was used to combine 6063 Al and MB2 Mg alloy sheets to produce an 6063 Al / MB2 cladding material sheet with multi-layer structure. The influence of annealing on micro-structure,mechanical properties and bonding interface of6063 Al / MB2 cladding material after different ARB passes was investigated by electronic tensile machine,OM and SEM. The results show that ARB technology can effectively refine the grain size of MB2 layer. After annealing at 180 ℃,the grain size of the sample is not obvious changed,but obvious grows above 320 ℃. Under annealing at 220 ℃,the tensile strength increases slightly than unannealed,but annealing above 220 ℃,the tensile strength decreases with annealing temperature increasing. Compared the samples of annealing and unannealed,the shear strength of the cladding material after annealing at low temperature increases slightly. With annealing temperature increasing,the thickness of diffusion layer increases,and the brittle inter-metallic created,and the shear strength of cladding material decreases.
引文
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[2]Tsuji N,Saito Y,Utsunomiya H,et al.Ultra-fine grained bulk steel produced by accumulative roll bonding(ARB)process[J].Scripta Materials,1999,40(7):795-800.
[3]詹美燕,李元元,陈维平.累积叠轧技术的研究现状与展望[J].中国有色金属学报,2007,17(6):841-851.ZHAN Mei-yan,LI Yuan-yuan,CHEN Wei-ping.Status and expectation of research on accumulative roll-bonding[J].The Chinese Journal of Nonferrous Metals,2007,17(6):841-851.
[4]宋鸿武,陈岩,程明,等.异种金属层状复合材料累积叠轧工艺的研究进展[J].材料导报A:综述篇,2011,25(10):7-12.SONG Hong-wu,CHEN Yan,CHENG Ming,et al.Progresses in the accumulative roll-bonding of clad bimetals[J].Materials Review,2011,25(10):7-12.
[5]Tae Park K,Joo Kwon H,Kim W J,et al.Microstructural characteristics and thermal stability of ultra-fine grained 6061 Al alloy fabricated by accumulative roll bonding process[J].Materials Science and Engineering A,2001,346:145-152.
[6]Bridgman P W.Studies in Large Plastic flow and Fracture[M].New York:Mc Graw-Hill,1952.
[7]Valiev R Z,Is lamgaliev R K,Alexandrov I V.Bulk nanostructure materials from severe plastic deformation[J].Progress in Materials Science,2000,45:103-189.
[8]陆文林,王勇,冯泽舟,等.沙漏挤压墩粗复合加工技术[J].热加工工艺,2001(2):10-12.LU Wen-lin,WANG Yong,FENG Ze-zhou,et al.Extrusion-upsetting multiple processing in sandglass[J].Hot Working Technology,2001(2):10-12.
[9]Richert M,Liu Q,Hansen N.Microstructural evloution over a large strain range in aluminium deformation by cyclic-extrusion-compression[J].Materials Science Engineering A,1999,260:275-283.
[10]张兵,袁守谦,吕爽,等.累积复合轧制对镁合金组织和力学性能的影响[J].中国有色金属学报,2008,18(9):1607-1612.ZHANG Bing,YUAN Shou-qian,LShuang,et al.Effect of accumulative roll bonding on microstructures and mechanical properties of MB2magnesium[J].The Chinese Journal of Nonferrous Metals,2008,18(9):1607-1612.
[11]张兵,袁守谦,张西锋,等.ARB工艺对1060工业纯铝组织和性能的影响[J].稀有金属,2008,32(2):135-139.ZHANG Bing,YUAN Shou-qian,ZHANG Xi-feng,et al.Effect of accumulative roll bonding(ARB)process on microstructure and mechanical properties of 1060 commercial pure aluminium[J].Chinese Journal of Rare Metals,2008,32(2):135-139.
[12]Av ed Esian M M,Baker H.Specialty Handbook Magnesium and Magnesium Alloy[M].Materials Park,OH,ASM international,1999.
[13]刘华塞,张滨,张广平.累积叠轧焊制备Al/AZ31多层复合材料及其强度[J].稀有金属,2009,33(2):285-289.LIU Hua-sai,ZHANG Bin,ZHANG Guang-ping.Al/AZ31 multilayered composite prepared by accumulative rolling bonding technique and its strength[J].Chinese Journal of Rare Metals,2009,33(2):285-289.
[14]Chang H,Zheng M Y,Gan W M,et al.Texture evolution of the Mg/Al laminated composite bu accumulative roll bonding at ambient temperature[J].Rare Metal Materials and Engineering,2013,42(3):0441-0446.
[15]陈力捷,樊建峰,董洪标,等.高周期累积叠轧法制备Mg/Al多层复合材料[J].材料热处理学报,2014,35(增刊1):28-33.CHEN Li-jie,FAN Jian-feng,DONG Hong-biao,et al.Fabrication of Mg/Al alloy multilayered composites by accumulative roll-bonding with large number of cycles[J].Transactions of Materials and Heat Treatment,2014,35(S1):28-33.