CAJ | 학술논문

利用电子万能拉伸试验机、扫描电子显微镜(SEM)、透射电子显微镜(TEM)研究3104铝合金经不同复合热处理制度(深冷处理+均匀化处理)处理后的力学性能和变形特征。先经深冷处理再均匀化处理的试样具有优异的综合力学性能，其抗拉强度、屈服强度和伸长率分别比仅经常规均匀化处理的试样提高了29%、41%和11%。经均匀化处理的试样的应力-应变曲线出现 Portevin-Le Chatelier 效应，而仅经受深冷处理的试样没有出现Portevin-Le Chatelier效应。这表明先深冷处理再均匀化处理可以促进3104铝合金中第二相弥散析出，大量细小、均匀分布的沉淀相强化了溶质原子对位错的钉扎效应，提高了3104铝合金的临界应变值。
이용전자만능랍신시험궤、소묘전자현미경(SEM)、투사전자현미경(TEM)연구3104려합금경불동복합열처리제도(심랭처리+균균화처리)처리후적역학성능화변형특정。선경심랭처리재균균화처리적시양구유우이적종합역학성능，기항랍강도、굴복강도화신장솔분별비부경상규균균화처리적시양제고료29%、41%화11%。경균균화처리적시양적응력-응변곡선출현 Portevin-Le Chatelier 효응，이부경수심랭처리적시양몰유출현Portevin-Le Chatelier효응。저표명선심랭처리재균균화처리가이촉진3104려합금중제이상미산석출，대량세소、균균분포적침정상강화료용질원자대위착적정찰효응，제고료3104려합금적림계응변치。
The mechanical properties of 3104 aluminum alloy processed by different combinations of cryogenic and homogenization treatments were studied. The 3104 aluminum alloy processed by the cryogenic treatment followed by homogenization exhibited an enhancement in the tensile strength, yield strength, and elongation by 29%, 41%, and 11%, respectively, as compared with a sample processed by the conventional homogenization treatment. The stress-strain curve of the sample processed by the homogenization treatment exhibited the Portevin-Le Chatelier effect, whereas the sample processed by the cryogenic treatment did not. Further, the cryogenic treatment could accelerate the precipitation of secondary phase particles for the sample processed by a deep cryogenic treatment, followed by a homogenization treatment, which enhanced the dislocation pinning effect of the solvent atoms and thus improved the critical strain.