CAJ | 학술논문

研究了微量稀土元素La对Al66Mn9Ti25金属间化合物显微组织、变形行为、裂纹生成的影响。在Al66Mn9Ti25金属间化合物中添加微量La，保持L 12结构，晶格常数基本无变化，促进了晶粒枝晶化和第二相弥散化，起到一定的抑制微裂纹生成和扩展以及沿晶开裂的作用；同时，还可增强位错的可动性，使压缩塑性得到改善。探讨了La改善变形行为的机制。
연구료미량희토원소La대Al66Mn9Ti25금속간화합물현미조직、 변형행위、 렬문생성적영향。 재Al66Mn9Ti25금속간화합물중첨가미량La， 보지L 12결구， 정격상수기본무변화， 촉진료정립지정화화제이상미산화， 기도일정적억 제미렬문생성화확전이급연정개렬적작용； 동시， 환가증강위착적가동성， 사압축소성 득도개선。 탐토료La개선변형행위적궤제。
The influence of lanthanum on the microstructure, deformed behavior, and microcr ack susceptibility of intermetallic compound Al66Mn9Ti25 was inves tigated. Adding lanthanum into intermetallic compound Al66Mn9Ti25, the lattice parameters are not changed and the L12 structure is maintaine d. The dendritical grain and fine second phase are obtained by adding lanthanum into this compound, which inhibits the microcrack susceptibility and intergranul ar failure. On the other hand, the movability of dislocation is enhanced. For th is reason, the compression ductility is improved. The mechanism about the role o f lanthanum in intermetallic compound Al66Mn9Ti25 was explored.