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, the coarsening processes of solid grains of as-received and 3P samples were dominated by the coalescence and Ostwald ripening mechanism, respectively. The difference of coarsening processes was mainly related to the proportion of the high-angle grain boundaries in materials, which further affected the evolution behavior of the liquid pools. Key words: AZ80M; equal channel angular pressing; semi-solid......
的转变远比θ′→θ的转变缓慢. 关键词:Al-Cu-Mg-Ag合金;Ω相;先析出相;二次析出相;粗化 中图分类号:TG 146 文献标识码:A Ageing precipitation behavior of high purity Al-Cu-Mg-Ag alloy ZHANG Kun, DAI Sheng-long... behavior of an experimental high purity Al-Cu-Mg-Ag type alloy was investigated during a long period of ageing time. The results show that the experimental alloy has good ductility and heat resistance......
distributions were essentially self-similar. The average particle size measured from the cross section was used to estimate the coarsening behavior. The measured particle size is shown in Fig. 17... the result indicated a behavior controlled by bulk diffusion and interface migration, SEMIATIN et al [11] suggested that it was also governed by bulk diffusion. Assuming the same coarsening exponent......
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′ phase coarsening behavior at high temperatures, the specimens were exposed to a temperature of 1100 °C for 200 h. The γ′ phase morphologies of the as-cast, heat-treated, and long-term exposed samples...Trans. Nonferrous Met. Soc. China 23(2013) 14-22 Effect of ruthenium on γ′ precipitation behavior and evolution in single crystal superalloys Li-rong LIU1, Tao JIN2, Jin-lai LIU2, Xiao-feng SUN2......
Modeling of shear induced coarsening effects in semi-solid alloys M. MODIGELL1, A. POLA2 1. AVT, Chair of Mechanical Process Engineering, RWTH Aachen University, Turmstr. 46, D 52056 Aachen... rheological shear experiments with semi-solid alloys, coarsening of the particles will falsify the interpretation of the experimental results. The coarsening is intensified by the shear induced......
Fe-12.4Cr-0.13C合金高温时效过程中碳化物的析出行为研究卢丽1,朱娜琼1,何燕霖1,李麟1(1.上海市上海大学材料科学与工程学院)摘 要:对高温时效条件下Fe-12.4Cr-0.13C(wt%)合金中碳化物的析出行为进行了计算与研究.研究中采用Thermo-Calc软件对碳化物的析出行为进行了热力学与动力学计算,而后采用HRTEM结合Image J图像分析软件表征了组织中碳化物的类型及粒径分布.结果表明:Fe-12.4Cr-0.13C合金经780℃长时间时效处理后,组织中析出M23C6型碳化物,当时......
Cellular automata modelling of austenite grain coarsening during reheating--I. Normal grain coarseningE.J.Palmiere,S.P.Banks摘 要:<正>A two-dimensional cellular automaton (CA) model has been developed for the description of the normal grain coarsening process. The probabilistic CA method incorporating Moore’s definition of the neighbourhood is used......
, LIU G, XIONG X. Precipitates and precipitation behavior in Al–Zr–Yb–Cr alloys[J]. Materials Letters, 2012, 75: 192-195. [9] PENG G, CHEN K, FANG H, CHEN S. A study of nanoscale Al3(Zr,Yb) dispersoids... alloys[J]. Materials Science and Engineering A, 2014, 616: 132-140. [25] COURTNEY T H. Mechanical behavior of materials[M]. Waveland Press, 2005. [26] 张 义. Er,Yb 微合金化铝合金中第二相的演变及与力学相关性的研究[D]. 北京: 北京工业......
CELLULAR AUTOMATA MODELLING OF GRAIN COARSENING DURING REIHEATING AND VALIDATION WITH THE EXPERIMENTAL RESULTS S.P.Banks1,E.J.Palmiere2,W.H.Yu3,J.T.Han3 (1.Department of Automatic Control..., University of Science and Technology Beijing,Beijing 100083, China) Abstract:A novel 2D cellular automata (CA) model has been developed for description of normal grain coarsening and abnormal grain......