Al-5Ti-B中间合金的热机械处理对铸造铝合金晶粒细化的强化作用(英文)  

Enhanced grain refinement of cast aluminum alloy by thermal and mechanical treatment of Al-5Ti-B master alloy

作　　者：H.GHADIMI S.HOSSEIN NEDJHAD B.EGHBALI 

机构地区：[1]Faculty of Materials Engineering,Sahand University of Technology

出　　处：《中国有色金属学会会刊：英文版》2013年第6期1563-1569,共7页Transactions of Nonferrous Metals Society of China

摘　　要：采用等温液相退火和塑性变形工艺制备含不同尺寸Al3Ti和TiB2粒子的Al-5Ti-B(质量分数,%)中间合金。结果表明:随着中间合金中Al3Ti和TiB2粒子尺寸的减小,合金的晶粒细化作用得到增强,但不适当地减小Al3Ti和TiB2的粒径可能导致这些颗粒作用减弱和结块,从而降低合金的晶粒细化效率。Al3Ti and TiB2 particles with various sizes in Al-5Ti-B (mass fraction, %) master alloy were produced by liquid-phase isothermal annealing and plastic deformation. The results show that with decreasing the size of particles in the master alloy, the grain refining performance is improved but, the refinement of the particles is useful, and immoderate refining probably accelerates fading of particles, agglomeration, hence decreasing the grain refin efficiency.

关 键 词：AL-TI-B合金 晶粒细化 铸造 自孕育 形核 

分 类 号：TG166.3[金属学及工艺—热处理]