中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 21 No. 9 September 2011 |
aluminum alloys using in situ voltage measurement
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Key Lab of Nonferrous Materials, Ministry of Education, Central South University, Changsha 410083, China）
Abstract:An effective method was proposed to establish the continuous cooling transformation (CCT) diagrams of aluminum alloys using in situ voltage measurement. The voltage change of samples with predefined dimension was recorded under the constant current state during continuous cooling. Solutionizing time, together with starting and finishing temperatures of phase transformation of the alloy can be obtained from relationships of voltage vs time and temperature. A critical cooling rate without detectable phase transition during continuous cooling can be determined. Continuous cooling transformation diagrams of tested samples can be established conveniently based on these results. Microstructure observation and differential scanning calorimetry (DSC) testing were applied to verify the reliability of continuous cooling transformation diagram.
Key words: aluminum alloys; in situ voltage measurement; phase transformation; CCT diagram; microstructure
