摘要
采用相图计算的方法对Al-Zn-Mg-Cu系合金进行凝固路径、相分数的热力学计算模拟,并通过DSC,XRD和SEM手段进行实验验证。结果表明,Al-9.5Zn-2.0Mg-1.7Cu合金中由α(Al)、η(MgZn2)相、Al7Cu2Fe和少量的θ(Al2Cu)组成,非平衡凝固路径的计算与实验结果相符合;Zn,Mg和Cu含量分别为9.5%,2.0%和1.7%(质量分数,下同)时,其η(MgZn2)相分数达到11.1%;可以将Cu/Mg=1作为合金设计时能否形成一定量θ(Al2Cu)的判据。
Thermodynamic calculation simulation of solidification paths and phases fraction for Al-Zn-Mg-Cu aluminum alloy were studied by using CALPHAD method.Experimental verifications were carried out by DSC,XRD and SEM.The result show that Al-9.5Zn-2.0Mg-1.7Cu alloy is consist of α（Al）,η（MgZn2） phase,Al7Cu2Fe and a few θ（Al2Cu）.Non-equilibrium solidification calculation is consistent with experimental observation.η（MgZn2） fraction arrives at 11.1％ when the Zn,Mg and Cu content are 9.5％,2.0％ and 1.7％,respectively.Cu/Mg =1 value is proposed as a criterion to judge the forming of θ（AI2Cu）.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2013年第6期1-7,共7页
Journal of Aeronautical Materials
基金
国家重点基础研究发展计划资助项目(2012CB619504)
国家自然科学基金项目(51271037)
国际科技合作项目(2010DFB50340)
关键词
热力学计算
析出相
凝固路径
CALPHAD
thermodynamic calculation
precipitated phase
solidification path
CALPHAD
