摘要
Stoichiometric (25.0% Al in mole) and hyperstoichiometric (26.5% Al in mole) Ni 3Al alloy can be made ductile by directional solidification in ceramic mould. In the stoichiometric alloy, texture formation varies between samples and more than 20% plastic elongation can be obtained. In the hyper stoichiometric alloy, strong 〈110〉 texture forms and 12% plastic elongation can be obtained. The high plastic elongation of the directionally solidified alloy is attributed to the suppression of intergranular fracture by reducing the portion of the transverse boundaries. The texture and microstructure formation mechanism were proposed.
Stoichiometric (25.0% Al in mole) and hyperstoichiometric (26.5% Al in mole) Ni 3Al alloy can be made ductile by directional solidification in ceramic mould. In the stoichiometric alloy, texture formation varies between samples and more than 20% plastic elongation can be obtained. In the hyper stoichiometric alloy, strong 〈110〉 texture forms and 12% plastic elongation can be obtained. The high plastic elongation of the directionally solidified alloy is attributed to the suppression of intergranular fracture by reducing the portion of the transverse boundaries. The texture and microstructure formation mechanism were proposed.
出处
《中国有色金属学会会刊：英文版》
CSCD
1999年第S1期208-213,共6页
Transactions of Nonferrous Metals Society of China
