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Trans. Nonferrous Met. Soc. China 24(2014) 2911-2919 Phase field model for strong interfacial energy anisotropy of HCP materials Xun-feng YUAN1,2, Bao-ying LIU1, Chun LI2, Chun-sheng ZHOU2, Yu-tian... November 2013 Abstract: Based on the Karma model and the Eggleston regularization technique of the strong interfacial energy anisotropy, a phase-field model was established for HCP materials......
to more addition of X elements. Based on these results, they suggested that a high fraction of the HCP martensite phase was probably one of the reasons for excellent SME in the CoAl binary alloys. However, they did not investigate why a high volume fraction of HCP martensite phase tended to cause a good SME in the CoAl alloys. In addition, the relationship between the stress-induced HCP......
-induced phase transformation from a face-centered-cubic (fcc) phase to a hexagonal-close-packed (hcp) phase. The transformation was studied during monotonic loading, stress-controlled high-cycle... that the hcp phase forms after reaching the yield stress. During HCF, the hexagonal phase forms immediately upon the first fatigue cycle, with no further change in structure upon subsequent deformation......
of the facet dendrites increases linearly. The facet dendrite growth has controlled diffusion and kinetics.Key words:phase field; facet dendrite; hcp materials; interfacial energy anisotropy...Simulation of facet dendrite growth with strong interfacial energy anisotropy by phase field methodYUAN Xun-feng(袁训锋)1, 2, LIU Bao-ying(刘宝盈)1, LI Chun(李春)2, ZHOU Chun-sheng(周春生)2, DING Yu-tian(丁雨田)3......
Trans. Nonferrous Met. Soc. China 25(2015) 2833-2846 Influence of welding parameters on material flow, mechanical property and intermetallic characterization of friction stir welded AA6063 to HCP... stir welding was attempted to evaluate the joint strength without offset at the butt line between AA6063 to HCP copper sheet under different combination of rotational speed of 800 and 1000 r/min......
文章编号: 1004-0609(2006)10-1778-09 fcc, hcp和bcc结构Au的原子状态及 物理性质随温度的变化关系 陶辉锦, 谢佑卿, 彭红建, 余方新, 刘锐锋, 李晓波 (中南大学 材料科学与工程学院, 长沙 410083) 摘 要: 结合纯金属单原子(OA)理论和Debye-Grüneisen模型, 采用CALPHAD方法确定的晶格稳定参数, 研究了SGTE 纯单质数据库中fcc, hcp和bcc 结构Au的原子状态, 原子势能, 原子动能, 原子体积, 体弹性模量和热膨胀系数等物理性质随温度的变化关系. 结果表明: OA理论得到的fcc-Au电子结构中的共价d电子数最少, 从而导致fcc-Au具有最大的单键半径以及最大的原子体积; 温度上升过程中, 3种结构的原子单键半径大小顺序为: fcc>bcc>hcp, 导致相应的原......
+fcc Al](5) The calculated energy difference between hcp and fcc Ti3Al compounds is very small, which makes it feasible to stabilize the L12 phase by ternary alloy additions. Considering electronic... Electronic structure and physical properties of hcp Ti3Al type alloys PENG Hong-jian(彭红建)1, 2, XIE You-qing(谢佑卿)2 1. School of Chemistry and Chemical Engineering, Central South University......
as the property characterization of DP cemented carbide[7-12]. As is known that martensitic phase transition of the cobalt based solid solution binder phase, i.e. fcc→hcp can take place during the cooling... the martensitic phase transition of the binder phase, i.e. fcc→hcp is suppressed. It can be deduced that the suppression of the martensitic phase transition is due to the dramatic increase......
Abnormal orientation relation between fcc and hcp structures revealed in a deformed high manganese steelPan Xie,Shucheng Shen,Cuilan Wu,Jianghua ChenCenter for High Resolution Electron Microscopy, College of Materials Science and Engineering, Hunan University摘 要:The crystallography of phase transformation is an important issue for studying metallic......
multilayers were investigated. A metastable HCP Fe phase is obtained when thickness of Fe film (tFe) is less than 5nm. Magnetic measurement indicats that the metastable HCP Fe phase exhibits...磁性能的影响. Fe层厚度小于5nm时, 受Ru层HCP结构的影响, Fe层生长为六方晶格的亚稳相. 多层膜呈现明显的平面易磁化特性, 并随Fe厚度降低而减弱. Fe的平均原子磁矩和Fe层厚度的倒数存在线性关系, 与死层理论预言的结果相一致. 实验结果证实, 亚稳相六方晶格的Fe具有铁磁性, 其平均原子磁矩计算值为1.9μB, 略低于BCC Fe, Fe/Ru界面层的死层厚度为0.25nm. 关......