CAJ | 학술논문

在铸造Mg-Zn-Cu-Zr合金100°C时效过程中观察到生长孪晶，采用光学显微镜和透射电子显微镜表征生长孪晶的形貌和位向。结果表明：在铸态和固溶态的Mg-Zn-Cu-Zr合金中未发现生长孪晶，仅在时效态合金中出现{1012}型生长孪晶。Zn 含量和热处理工艺显著影响其孪生行为。最后，从空位角度讨论此类生长孪晶可能的生长机制。
재주조Mg-Zn-Cu-Zr합금100°C시효과정중관찰도생장련정，채용광학현미경화투사전자현미경표정생장련정적형모화위향。결과표명：재주태화고용태적Mg-Zn-Cu-Zr합금중미발현생장련정，부재시효태합금중출현{1012}형생장련정。Zn 함량화열처리공예현저영향기련생행위。최후，종공위각도토론차류생장련정가능적생장궤제。
The morphology and orientation of the growth twins formed in the cast Mg-Zn-Cu-Zr alloys aged at 100 °C were characterized using optical microscopy and transmission electron microscopy. It was found that twins were invisible in the as-cast or solutionized Mg-Zn-Cu-Zr alloys while {10 12} twins were exclusively formed in the aged condition. The twinning behavior was significantly affected by two factors, namely, the Zn content and the heat treatment process. A possible formation mechanism of such growth twins was discussed using the viewpoint of vacancy.