摘要
Al,Mg ,Si和Cu元素粉末按 60 61铝合金成分配比进行了机械合金化 (MA) ,对其物相、合金化特性、晶格常数、晶粒尺寸及点阵应变作了测定和分析讨论。MA初期晶粒尺寸可以达到纳米级 ,最小晶粒尺寸 2 0nm ;粉末点阵应变最终达 0 .2 % ;Al晶格常数变化的总趋势是不断减小 ;塑性较好的元素粉末可在“面上”作短程扩散 ,合金化易于进行 ,可实现完全合金化 ;硬度较高的脆性元素粉末只在“点上”作短程扩散 ,合金化不易进行 。
According to the composition of 6061 aluminum alloy, the Al, Mg, Si and Cu element powders were mechanical alloyed. Physics phases, alloying character, lattice constant, grain size and lattice strain of these powders were determined and discussed. At an initial stage of mechanical alloying, grain size can reach up to nanometer level, the finest grain size reach up to 20?nm. Generally, lattice constant is decreased, lattice strain is about 0.20% finally. Ductile element powder can diffuse through a shorter path on the plane, thus, alloying of these element powders is carried out easily and can been realized fully. Otherwise, brittle element powder can only diffuse through a shorter path on the point, its alloying is more difficulty and can been realized partly.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第4期642-646,共5页
The Chinese Journal of Nonferrous Metals
基金
西安交通大学教育振兴行动计划重大课题
关键词
机械合金化
MA粉末
铝粉
镁粉
硅粉
铜粉
mechanical alloying
Al, Mg, Si and Cu element powders
physics property
alloying character
