Pollock, A first-principles study of the effect of Ta on the superlattice intrinsic stacking fault energy of L12-Co3 (Al, W), Intermetallics 28 (2012) 138-143.Mottura, A.; Janotti, A.; Pollock, T.M. A first-principles study of the effect of Ta on the superlattice intrinsic stacking...
Precipitation strengthening, yield stress anomaly and strain rate sensitivity of an L1 2-ordered intermetallic (Ni, Co) 3(Al, Ti) alloy Liu W, Krol T.Precipitation Strengthening, yield stress anomaly and strain rate sensitivity of an L12-ordered intermetallic (Ni,Co) 3(Al,Ti) alloy[J]......
Abstract Nineteen transition metal elements have been taken into account to study the alloying effects on the relative phase stability, elastic properties and electronic structure of L12Co3V compound, based on the first-principles calculations. The site preference of ternary alloying elements was primaril...
The objective of the present work was to study the mechanical properties of an L12-ordered intermetallic (Ni,Co)3 (Al,Ti) alloy. Emphasis is placed on the observation of the precipitation process and age hardening as well as on the measurements of the temperature dependence and strain rate se...
同时γ′-Co3(Al1-xWx)相由延性材料向脆性材料过渡转变.通过分析电荷密度和态密度的计算结果,发现随W原子分数的增大,Co和W之间共价键的结合强度呈现增大的趋势,并且Co原子间的电荷密度分布逐渐由各向异性向各向同性过渡转变.在有限温度下,随W原子分数的升高,γ′-Co3(Al1-xWx)相的热容,热...
采用第一性原理方法并结合准简谐德拜模型,系统研究了W原子分数对Co基高温合金中γ′-Co3(Al(1-x)Wx)(x=0,0.25,0.50,0.75,1.0)相的弹性性质和热力学性质的影响.研究发现随W原子分数的升高,γ′-Co3(Al(1-x)Wx)相的弹性模量显著提高,而弹性各向异性的程度明显降低,同时γ′-Co3(Al(1-x)Wx)相...
T Oohashi,N.L Okamoto,K. Kishida, et al.Microstructures and Mechanical Properties of Co3(Al,W) with the L12 Structure. Materials Research Society Symposium Proceedings . 2009OOHASHI T, OKAMOTO N L, KISHIDA K, TANAKA K, INUI H. Microstructures and mechanical properties of Co3(Al,W) with ...
First- principles investigation of electronic, mechanical and thermodynamic properties of L12 ordered Co3(M, W) (M 1/4 Al, Ge, Ga) phases. Acta Mater 2013;61:5437e48.W. Xu, J. Han, Y. Wang, C. Wang, X. Liu, Z.-K. Liu, First-principles investigation of electronic, mechanical ...
The plastic behaviour of Co3(Al,W) polycrystals with the L12 structure has been investigated in compression from 77 to 1273K. The yield stress exhibits a rapid decrease at low temperatures (up to room temperature) followed by a plateau (up to 950K), then it increases anomalously with ...
We performed a systematic study of alloying effects on the site preference, elastic properties and phase stability of L12 γ′-Co3(Al, W) in terms of the first-principles calculations. Up to twenty-one transition metal elements (Sc, Ti, V, Cr, Mn, Fe, Ni, Y, Zr, Nb, Mo, Tc, Ru...