CAJ | 학술논문

利用高分辨透射电镜和硬度测试表征时效态AlMgCu铝合金激冷甩带的析出相组成。铸态合金甩带的冷却速率通过经验公式计算为1.60×105 K/s。T6态热处理是试样经固溶处理后再进行200°C保温16 h的时效处理。结果表明，T6态AlMgCu铝合金激冷甩带含有Al2CuMg相和反常非晶SiO2两种析出相。Al2CuMg 析出相的晶体结构和成分配比与文献[Wang et al.(2007；2005)]结果一致。综合实验结果分析表明，反常非晶SiO2相的析出可能与激冷甩带具有高的冷却速率有关，它的析出对其硬度的影响不大。
이용고분변투사전경화경도측시표정시효태AlMgCu려합금격랭솔대적석출상조성。주태합금솔대적냉각속솔통과경험공식계산위1.60×105 K/s。T6태열처리시시양경고용처리후재진행200°C보온16 h적시효처리。결과표명，T6태AlMgCu려합금격랭솔대함유Al2CuMg상화반상비정SiO2량충석출상。Al2CuMg 석출상적정체결구화성분배비여문헌[Wang et al.(2007；2005)]결과일치。종합실험결과분석표명，반상비정SiO2상적석출가능여격랭솔대구유고적냉각속솔유관，타적석출대기경도적영향불대。
The constituent of precipitations phases of aged melt-spun AlMgCu ribbons was characterized by high-resolution transmission electron microscopy and microhardness test. The cooling rate of as melt-spun ribbon was estimated to be 1.60×105 K/s from the empirical relation. The samples were aged at 200 °C for 16 h after solution treatment. Two precipitation phases, i.e. Al2CuMg and abnormal amorphous SiO2 were identified in the T6 melt-spun AlMgCu ribbon. The crystal structure and stoichiometric composition of Al2CuMg phase are in good agreement with the reference results [WANG et al (2007; 2005)]. The combined experiments show that the formation of abnormal amorphous SiO2 appears to be associated with the higher cooling rate in melt-spinning process and has no significant effect on the peak hardness.