| Influences of processing routine on mechanical properties and structures of 7075 aluminum alloy thick-plates |
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| 引用本文： | 林高用,张辉,张行健,韩冬峰,张颖,彭大暑. Influences of processing routine on mechanical properties and structures of 7075 aluminum alloy thick-plates[J]. 中国有色金属学会会刊, 2003, 13(4) |
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| 作者姓名： | 林高用 张辉 张行健 韩冬峰 张颖 彭大暑 |
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| 作者单位： | College of Materials Science and Engineering，College of Materials Science and Engineering，College of Materials Science and Engineering，College of Materials Science and Engineering，College of Materials Science and Engineering，College of Materials Science and Engineering Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，College of Materials Science and Engineering，Hunan University，Changsha 410082，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China |
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| 基金项目： | Project(G19990 64 90 8)supportedbytheNationalKeyFundamentalResearchDevelopmentProgramofChina |
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| 摘 要： | 1 INTRODUCTIONAluminumalloy 70 75 ,havingsuperiormechani calpropertieswithahighspecificstrength ,isoneoftheattractiveengineeringmaterialsforapplicationinaircraftstructural partsandotherhighlystressedstructuralapplicationswhereveryhighstrengthandgoodresistancetocorrosionarerequired[1,2 ] .Itmayperform greatdifferentlywithdifferentworkprocess ing .Investigationsonthisalloyhavealwaysbeengo ingoninordertotapitslatentpowerofservice[37] .Alloying ,grainrefiningandsolution agingarethemainmethod…
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Influences of processing routine on mechanical properties and structures of 7075 aluminum alloy thick-plates |
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| LIN Gao yong ,ZHANG Hui ,,ZHANG Xing jian ,HAN Dong Feng ,ZHANG Ying ,PENG Da shu. Influences of processing routine on mechanical properties and structures of 7075 aluminum alloy thick-plates[J]. Transactions of Nonferrous Metals Society of China, 2003, 13(4) |
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| Authors: | LIN Gao yong ZHANG Hui ZHANG Xing jian HAN Dong Feng ZHANG Ying PENG Da shu |
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| Affiliation: | LIN Gao yong 1,ZHANG Hui 1,2,ZHANG Xing jian 1,HAN Dong Feng 1,ZHANG Ying 1,PENG Da shu 1 |
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| Abstract: | 7075 aluminum alloy thick plates were produced by three processing routines: commercial hot rolling followed by heat treatment of quenching and ageing (HR+QA), combination of large deformation processing of multi directional warm forging and subsequent warm rolling followed by heat treatment of quenching and ageing (LD+QA), and that followed by annealing at moderate temperature (LD+AN). Tensile strength, yield strength and elongation were measured by tension test, and the metallographic structures were examined by optical microscopy (OM) and transmission electron microscopy (TEM), also the fracture morphologies were observed by scanning electron microscopy (SEM). It is shown that higher tensile strength and yield strength are obtained from (LD+QA) processing in comparison with those from (HR+QA) and (LD+AN) processings. Tensile strength and yield strength obtained from (LD+QA) processing are 9.9% and 8.6% higher respectively than those from (HR+QA) processing, and 48.6% and 57.7% higher respectively than those from (LD+AN) processing; while the elongations of all the samples show no significant difference and keep 10%12%. Analyses of OM and TEM reveal that the mechanical behaviors are deeply associated with the formation of refined structures with fine grains and very fine precipitates, leading to fine grained hardening and excellent age hardening. |
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| Keywords: | 7075 aluminum alloy multi directional large deformation microstructure mechanical property |
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