摘要
当冷速达10~6K/s量级时,Ni-34.6at-％Al合金中,富Ni的NiAl的微观组织尺寸显著减少,高密度、均匀分布的各类界面阻滞了裂纹的扩展,并在裂纹尖端产生局域塑性变形。
In rapidly solidified Ni-34.6 at-%Al alloy, when cooling rate duringsolidification reached the order of 10~6K/s, the size of the microstructures, such as grain andsubstructure of the martensite, decreased dramatically. The various kinds of interfaces withhigh density and homogeneous distribution resisted effectively the propagation of the cracksand resulted in localized plastic deformation ahead of the tips of microcracks. The ductilityand toughness at room temperature of the Ni-rich NiAl may be improved considerably.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第3期A121-A125,共5页
Acta Metallurgica Sinica
基金
英国皇家学会奖学金资助
中国科学院金属研究所快速凝固非平衡合金实验室部分资助
关键词
NIAL
快速凝固
延性
韧性
NiAl
rapid solidification
ductility
toughness
