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of the Al3Zr precipitate. Key words: aluminium alloys; Al3Zr precipitate; phase transformation 1 Introduction The age-hardening treated Al-Cu alloys are used for structural components because... transformation from metastable L12 to D023 structure. High magnification images of the precipitate display an ellipsoidal shape with a long axis along the anti-phase boundary (APB) (Fig. 4(b......
after aging. The effect of aging on the transformation behavior of Nb-doped dual-phase alloys was also investigated in the present work. Figure 3 shows the susceptibility-temperature curves...Trans. Nonferrous Met. Soc. China 29(2019) 2117-2127 Effect of thermal treatment and ball milling on microstructure and phase transformation of Ni-Mn-Ga-Nb alloys Jun-song WANG1,2, Bing TIAN1,2, Yun......
increases, the phase change start time postpones, and the subcooling decreases. △GE and Qq which are taken as phase change resistance have impact on subcooling behavior of inorganic salt hydrate PCM.... Material solid-state phase transformation and diffusion[M]. 1st ed. Beijing: Chemical Industry Press, 2006: 145. (编辑 陈灿华) 收稿日期:2017-01-13;修回日期:2017-03-20 基金项目(Foundation item):国家自然科学基金资助项目......
. A fully coupled 3D temperature-displacement analysis was performed to simulate heat transfer, phase transformations, and mechanical stresses and strains during the heating and subsequent quenching processes. Commercial FEA package ABAQUS/Standard 6.4 was used for the analyses along with user subroutines developed by the authors to model the thermal and mechanical constitutive behavior. The simulation......
expansion curve shows that the ferrite layer without pearlite is formed during the local phase transformation, which is followed by the global transformation. The carbon concentration in the core... is the diffusion of matrix atoms, and this diffusion realizes the phase transformation from a face-centered cubic (fcc) symmetry (austenite) into a body-centered cubic (bcc) symmetry (ferrite......
Phase Transformation Behavior and Microstructural Control of High-Cr Martensitic/Ferritic Heat-resistant Steels for Power and Nuclear Plants: A ReviewXiaosheng Zhou1,Chenxi Liu1,Liming Yu1,Yongchang... rates.The kinetic analysis suggested a thermal-activated growth feature occurring during the martensitic transformation of martensitic steels. The microstructure can be tuned by composition optimization......
℃/s). Key words: T24 steel;continuous cooling transformation diagram;continuous cooling;phase transformation 提高火力发电机组参数是提高机组效率,可靠性和节能环保的重要途径,超临界火电机组具有显著的节能和改善环境的效果[1-2],正逐步取代污染大,能耗高的中小型发电机组,成为火电企业的主要机... steel at lower and higher cooling rates 图3 杠杆法计算组织转变量的示意图 Fig. 3 Schematic diagram of lever method for evaluating fraction of phase transformation 图4所示为计算得到的T24钢在不同冷却速度下过冷奥氏体转变体积分数与温度的关系.从图4可见:当冷却......
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Introduction Recently, a unique phenomenon called temperature memory effect(TME) induced by incomplete phase transformation has attracted much attention[1-10]. An incomplete transformation cycling... transformation cycling. The schematic illustration of incomplete transformation cycling during the reverse martensitic transformation is shown in Fig.1(b): (Step 1) heating from full martensite phase (T<Mf......
MATHEMATICAL MODELLING OF PHASE TRANSFORMATION FROM HOT-DEFORMED AUSTENITE IN LOW CARBON STEELS X.H.Liu1,Y.B.Xu1,G.D.Wang1 (1.State Key Laboratory of Rolling And Automation, Northeastern University... steel were predicted considering both undeformed and deformed conditions. The influence of deformation on phase equilibria and transformation incubation period was evaluated quantitatively......