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논문 기본 정보

자료유형
학술저널
저자정보
Ke Huang (Central South University) Youping Yi (Central South University) Shiquan Huang (Central South University) Hailin He (Central South University) Fei Dong (Central South University) Yunfan Fu (Central South University) Yanzhen Jia (Central South University) Wenwen Yu (Central South University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.30 No.5
발행연도
2024.5
수록면
1,331 - 1,341 (11page)
DOI
10.1007/s12540-023-01565-w

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초록· 키워드

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The temperature–time-property (TTP) curve of the cryogenic deformed 6061 aluminum alloy was fitted in this study, and thesensitive temperature range was determined through interrupted quenching experiments. The precipitation behavior duringisothermal treatment of the cryogenic deformed samples was observed and analyzed by the differential scanning calorimetry(DSC), optical microscope (OM), and transmission electron microscope (TEM), and the premature precipitation mechanismduring isothermal treatment was discussed in detail. The results revealed that the critical time for a 5% drop in hardness atthe nose temperature (400 °C) was 25.2 s. Furthermore, the sensitive temperature range was determined to be from 360 to420 °C. At 400 ℃, the supersaturated solution transformation rate reached its maximum, and coarse β equilibrium phaseswere rapidly precipitated in the grain. However, when the temperature was outside the sensitive range, the transformationrate decreased, and several β" and β′ phases were observed, indicates a lower degree of premature precipitation of the alloy. The high sensitivity at nose temperature can be attributed to the relatively high nucleation and growth rates of phases. Basedon the experimental results, the cooling rate at the sensitive temperature range should be increased, while the cooling ratefrom the solution temperature to 420 °C should be properly decreased during the quenching process to obtain relatively highmechanical properties and low residual stresses.

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