CAJ | 학술논문

通过透射电镜和高分辨透射电镜研究 Cu-0.69Cr-0.10Zr-0.02Mg 合金在450℃早期时效的析出贯序。研究表明：合金在450℃早期时效的析出贯序为过饱和固溶体→溶质偏聚→FCC富Cr的GP区(Ⅰ)→FCC有序富Cr的GP区(Ⅱ)→BCC有序富Cr相。在脱溶演变过程中，析出相和基体之间的界面由完全共格界面向共格-半共格界面转变，位向关系由立方-立方向Nishiyama-Wassermann位向关系转变。共格界面的形成有利于FCC富Cr相的形成。富Cr析出相的有序化加速析出进程，并有利于BCC相的形成，促进了Nishiyama-Wassermann位向关系的发展。
통과투사전경화고분변투사전경연구 Cu-0.69Cr-0.10Zr-0.02Mg 합금재450℃조기시효적석출관서。연구표명：합금재450℃조기시효적석출관서위과포화고용체→용질편취→FCC부Cr적GP구(Ⅰ)→FCC유서부Cr적GP구(Ⅱ)→BCC유서부Cr상。재탈용연변과정중，석출상화기체지간적계면유완전공격계면향공격-반공격계면전변，위향관계유립방-립방향Nishiyama-Wassermann위향관계전변。공격계면적형성유리우FCC부Cr상적형성。부Cr석출상적유서화가속석출진정，병유리우BCC상적형성，촉진료Nishiyama-Wassermann위향관계적발전。
The precipitation process in Cu-0.69Cr-0.10Zr-0.02Mg alloy during the early aging stage at 450 ℃ was investigated by transmission electron microscopy and high resolution transmission electron microscopy. The precipitation sequence in the Cu-Cr-Zr-Mg alloy aged at 450 ℃ is supersaturated solid solution→solution segregation→GP zone (Ⅰ) (FCC Cr-rich phase)→GP zone (Ⅱ) (ordered FCC Cr-rich phase)→ordered BCC Cr-rich phase. In the evolution of decomposition, the interface between the precipitates and the Cu matrix changes from the full coherent one to the coherent-partial coherent one, and the orientation relationship changes from the cube-on-cube to Nishiyama-Wassermann. The coherent interface between the FCC Cr-rich precipitates and Cu matrix facilitates the formation of the FCC precipitates. The ordering of Cr-rich precipitates accelerates the precipitation process, which facilitates the formation of the BCC precipitates and promotes the development of Nishiyama-Wassermann orientation relationship.