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J. Cent. South Univ. Technol. (2011) 18: 1780-1788 DOI: 10.1007/s11771-011-0902-4 Simulation of faceted dendrite growth of non-isothermal alloy in forced flow by phase field method CHEN Zhi(陈志)1, HAO... investigated. Key words: phase field method; forced flow; strong anisotropy; faceted dendrite; steady state tip velocity 1 Introduction Dendrites are common shapes in the melt solidification......
温度对Al-11.4%Li合金沉淀机制影响的微观相场模拟苗海川1,王永欣1,陈铮1,钟汉文1,孙立岩1(1.陕西省西安市西北工业大学 材料学院)摘 要:利用微观相场法模拟Al-11.4%Li合金时效过程中的微观组织.从模拟结果可以看出,该合金在383,423和493K下沉淀机制分别为失稳分解,非经典形核与失稳分解的混合机制和非经典形核长大.随温度的升高,新相颗粒逐渐规则,溶质原子的簇聚程度以及体系整体的有序化程度都在不断的降低.关键词:金属材料; Al-Li合金; 微观相场; 沉淀机制......
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in martensitic alloy [J]. Acta Mater, 2007, 55: 565-574. [8] SIMMONS J, WEN Y, SHEN C, WANG Y. Microstructural development involving nucleation and growth phenomena simulated with the phase field method [J...): 686-693. [20] HOU Hua, ZHAO Yu-hui, NIU Xiao-feng. 3D anisotropy simulation of dendrites growth with phase field method [J]. Transactions of Nonferrous Metals Society of China, 2008, 18(2): 223-228. [21......
系.基于上述关系,提出由名义硬度和压入比功确定材料弹性模量的新方法,同时分析该方法的理论误差,验证结果表明该方法较传统Oliver-Pharr方法具有更高的测试精度. 关键词:弹性模量;仪器化压入;硬度;压入功;有限元方法 中图分类号:TG113.25;O242.21 文献标志码:A Method for determining... tests were analyzed by employing dimensional theorem and finite element method. A combined elastic modulus, Ec, was introduced to accurately reflect the combined elastic effect of an indenter......
A microscopic phase-field kinetics model was developed as a new method of material simulation in 1990s[1-3]. It is a deterministic phase-field method based on the ONSAGER and GINZBURG-LANDAU theory[4...J. Cent. South Univ. Technol. (2008) 15: 588-592 DOI: 10.1007/s11771-008-0110-z Microscopic phase-field simulation of Cr atom substitution character during formation of L12 and DO22 phases in Ni......
(SCC-DV-Xα) method. The calculated results indicate that when Al is added into VH2, the net charge of H decreases absolutely, on the other hand, the net charge of V decreases and increases partially... to improve the property of absorbing and releasing of hydrogen. Key words: hydride VH2; alloying; self-consistent charge discrete variational Xα method  ......
cement industry and parts of plants. This article proposes the calculation method of cement carbon footprint of Chongqing before leaving plant (CCFC-BLP) basic on Intergovernmental Panel on Climate Change (IPCC) calculation method. The calculation result, according to basic scenarios, reveals that CCFC-BLP is about 1.026 6 million t per year, carbon emission factor is 0.668. The value of CCFC-BLP......
photocatalysts were synthesized by a liquid-exfoliation-solvothermal method. In this process, the WS2/g-C3N4 nano-sheets were prepared by liquid-exfoliation method from the bulk WS2 and C3N4 in the alcohol... demonstrated that was the main active radical in photocatalytic reaction process. Key words: g-C3N4; TiO2; WS2; photocatalysis; liquid-exfoliation; solvothermal method 1 Introduction TiO2 has......
Ageing process of pre-precipitation phase in Ni0.75Al0.05Fe0.2 alloy based on phase field method DONG Wei-ping1, WANG Yong-xin1, CHEN Zheng1, 2, YANG Kun1 1. College of Materials Science... 2010; accepted 9 September 2010 Abstract: By utilizing phase field method combined with analysis on free energy and interatomic potentials, pre-precipitation phase formation and transformation......