AW-7075-T6 sheet for shock heat treatment forming process  

冲击热处理AW-7075-T6板材的成形过程（英文）

作　　者：M.KUMAR M. KUMAR(LKR Leichtmetallkompetenzzentrum Ranshofen Gmb H, Austrian Institute of Technology;EBNER Industrieofenbau Gmb H)

机构地区：[1]LKR Leichtmetallkompetenzzentrum Ranshofen GmbH, Austrian Institute of Technology,Lamprechtshausnerstrasse 61, postfach 26,5282, Ranshofen, Austria [2]EBNER Industrieofenbau GmbH, Ebner-Platz 1,4060, Leonding, Austria

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第10期2156-2162,共7页中国有色金属学报（英文版）

基　　金：the Austrian Federal Ministry for Transport, Innovation and Technology (BMVIT) and the federal state of Upper Austria for funding this research work within the frame work of Independent research UF2015

摘　　要：The forming behaviour of AW-7075-T6sheet was studied across a range of shock heat treatment(SHT)temperatures of200?480°C.After SHT,formability of the samples was investigated by tension and deep drawing tests at room temperature.Differential scanning calorimetry(DSC)was used to study the precipitation states of the AW-7075sheet in the as-received and shockheat treated conditions.Formability was started to improve with increasing shock heat treatment temperature from300°C onwards.Strain hardening resulted from the dissolution ofη′precipitates and the coarsening of remaining precipitates were found to contributeto the increase in formability at room temperature.Re-precipitation and coarsening of the precipitates were responsible for thepost-paint baking strength of SHT samples.研究AW-7075-T6板材在200～480℃进行冲击热处理的成形行为。采用室温拉伸和深拉拔试验表征冲击热处理后样品的可成形性;采用差示扫描量热法(DSC)分析AW-7075板材冲击热处理前后的相沉积状态。结果表明,从300℃起,随着冲击热处理温度的升高,板材的成形性开始提高;由η′析出物溶解导致的应变硬化以及剩余析出物的粗化有助于板材室温成形性能的提高;沉淀物的再析出和粗化是冲击热处理试样强度提高的主要原因。

关 键 词：shock heat treatment forming AW-7075-T6 sheet FORMABILITY precipitation kinetics 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG166.3[金属学及工艺—金属材料]