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Transactions of Materials and Heat Treatment. 2013, (04) Core

TTT curves of an Al-Mg-Si-Mn alloyChinese Full Text

LI Shen-lan1,2,HUANG Zhi-qi2,3,CHEN Wei-ping1,LIU Zhi-ming2,QI Wen-jun4(1.School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China;2.Guangdong Fenglu Aluminum Co Ltd,Foshan 528133,China; 3.School of Materials Science and Engineering,Central South University,Changsha 410083,China; 4.Guangzhou Research Institute of Nonferrous Metals,Guangzhou 510650,China)

Abstract: To investigate the quench sensitivity of an Al-Mg-Si-Mn aluminum alloy,the time-temperature-transformation（TTT） curves of the aluminum alloy were determined by an interrupted quench method and simulated by JMatPro software,respectively.The microstructure evolution and phase transformation kinetics during isothermal treatment were studied by XRD,EDS and Avrami equation.The results show that electro-conductivity of the alloy increases with prolonging holding time at the same isothermal temperature.The TTT curves obtained by experiments are consistent with the results simulated by JMatPro software.The nose temperature of TTT curves is 360 ℃,and the quench sensitivity is very high at the tip of the nose temperature,while the quench sensitivity is lower at the lower and higher temperature zones.The phase transformation of the investigated alloy is mainly the thickening of rod or needle phases during the isothermal holding.
Keywords：

Al-Mg-Si-Mn alloy; TTT curves; JMatPro software; quench sensitivity;

  • DOI：

    10.13289/j.issn.1009-6264.2013.04.013

  • Series：

  • Subject：

  • Classification Code：

    TG146.21

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