摘要
利用搅拌摩擦技术,使叠放在一起的Cu、Al板材发生强烈的热塑性变形。对搅拌区产物的显微结构分析表明:Cu、Al板材被搅拌破碎并充分混合在一起,Cu、Al元素发生扩散并实现合金化;在搅拌区中有许多尺寸>1μm的非晶相和非晶/纳米晶复合相,非晶相的基体中含有平均尺寸约为5nm的纳米晶。热塑性变形技术不仅可用于块体金属材料的机械合金化,也可用于制备块体非晶/纳米晶复合材料。
Strong thermoplastic deformation of overlapped Cu and A1 plates had been realized by stir friction processing. Transmission electron microscopy investigation on the microstrueture of the stirred zone demonstrate that the Cu and Al plates are torn into shreds and well-mixed in the stirred zone. The inter-diffusion between Cu and A1 shreds happens, resulting in the mechanical alloying of Cu/A1 plates. There are many amorphous phases with size of more than 1 micron and amorphous/nanocrystalline composite phases in the deformation zone. The average size of the nanocrystallines surrounded by amorphous phases, is about 5 nanometers. Experimental results strongly suggest that the thermoplastic deformation technique can not only be used to do mechanical alloying for bulk metallic materials but also to fabricate bulk amorphous/crystalline materials.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2013年第1期48-52,共5页
Powder Metallurgy Technology
关键词
热塑性变形
非晶
纳米晶复合材料
搅拌摩擦焊
thermoplasitic deformation
bulk amorphous/nanocrystalline composite
stir friction welding
作者简介
段辉平（1966-），男，副教授。E—mail：hpduan@buaa．edu．cn
