Abnormal precipitation behavior in T6 melt-spun AlMgCu ribbon  

T6态AlMgCu铝合金激冷甩带的反常析出行为(英文)

作　　者：陈忠伟[1] 汤明军[1] 李士顺[1] 冯宗强[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第1期22-27,共6页中国有色金属学报（英文版）

基　　金：Project(42-QP-009)supported by Research Fund of the State Key Laboratory of Solidification Processing,China;Project(Z2012019)supported by Graduate Starting Seed Fund of Northwestern Polytechnical University,China;Project(B08040)supported by the Program of Introducing Talents of Discipline to Universities("111"Project),China

摘　　要：The constituent of precipitations phases of aged melt-spun AlMgCu ribbons was characterized by high-resolution transmission electron microscopy and microhardness test. The cooling rate of as melt-spun ribbon was estimated to be 1.60×105 K/s from the empirical relation. The samples were aged at 200 ＆#176;C for 16 h after solution treatment. Two precipitation phases, i.e. Al2CuMg and abnormal amorphous SiO2 were identified in the T6 melt-spun AlMgCu ribbon. The crystal structure and stoichiometric composition of Al2CuMg phase are in good agreement with the reference results [WANG et al （2007; 2005）]. The combined experiments show that the formation of abnormal amorphous SiO2 appears to be associated with the higher cooling rate in melt-spinning process and has no significant effect on the peak hardness.利用高分辨透射电镜和硬度测试表征时效态AlMgCu铝合金激冷甩带的析出相组成。铸态合金甩带的冷却速率通过经验公式计算为1.60×105 K/s。T6态热处理是试样经固溶处理后再进行200°C保温16 h的时效处理。结果表明,T6态AlMgCu铝合金激冷甩带含有Al2CuMg相和反常非晶SiO2两种析出相。Al2CuMg析出相的晶体结构和成分配比与文献[Wang et al.(2007;2005)]结果一致。综合实验结果分析表明,反常非晶SiO2相的析出可能与激冷甩带具有高的冷却速率有关,它的析出对其硬度的影响不大。

关 键 词：AlCuMg alloy melt spinning precipitation amorphous 

分 类 号：TG146.21[一般工业技术—材料科学与工程]