Al-Zn-Mg-Cu合金连续冷却转变曲线的测量-中国有色金属学报.PDFVIP

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Al-Zn-Mg-Cu合金连续冷却转变曲线的测量-中国有色金属学报.PDF

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Al-Zn-Mg-Cu合金连续冷却转变曲线的测量-中国有色金属学报

18 9 2008 9 Vol.18 No.9 The Chinese Journal of Nonferrous Metals Sep. 2008 1004-0609(2008)09-1613-09 Al-Zn-Mg-Cu ( 410083) Al-Zn-Mg-Cu X Al-Zn-Mg-Cu TG 151 A Testing of continuous cooling transformation curve of Al-Zn-Mg-Cu alloy LI Hong-ying, TANG Yi, ZENG Zai-de, WANG Fa-yun, SUN Yuan (School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: The solid phase and continuous cooling transformation(CCT) of Al-Zn-Mg-Cu alloy during continuous cooling were studied. The critical solution temperature was established by mechanical properties test and microstructures observation. The resistance testing and X-ray diffraction were used to establish the activated temperature of phase transformation. The completed temperature of phase transformation was measured by microstructures observation and quantificational analysis. The critical cooling velocity was approached by reducing the experimental cooling velocity step by step. The microstructures of samples cooled at different cooling velocity were analyzed and compared. The results show that continuous resistance testing can be utilized to study phase transformation in aluminum alloy effectively. The relatively complete CCT curves of aluminum alloy can be obtained by different methods at different cooling velocity. Key words: Al-Zn-Mg-Cu alloy; continual resistance testing method; continuous cooling transformation curve Al-Zn-Mg-Cu(7××× ) Al-Zn-Mg-Cu, [1]