Ni含量梯度变化的Cu-Ni合金力学性能分子动力学模拟
Molecular Dynamics Simulations on Mechanical Properties of Cu-Ni Alloys with Gradient Distribution of Ni Content
作者: 黄鸿翔 , 陈尚达 , 吴勇芝 ：湘潭大学，材料科学与工程学院，湖南 湘潭;
关键词: 分子动力学； Cu-Ni合金； 三叉晶界； 屈服强度； Molecular Dynamics； Cu-Ni Alloys； Triple Junction； Yield Strength
摘要:Abstract: Molecular dynamics (MD) simulations of nanocrystalline Cu-Ni alloys with different gradient dis-tribution of Ni content under uniaxial tensile straining were performed to study their deformation behaviors and mechanical properties. The results indicate that, with the increase of concentration gradient of the Ni, the elasticity young’s modulus of Cu-Ni alloy increases gradually, and the yield strength and ductility of the alloy were impacted by the change of Ni content. When tensile direc-tion perpendicular to the direction of concentration gradient, the cracks appeared in triple junction firstly after yield stage, and then in the area of Ni content close to 50 percent. When concentration gradient of Ni is very high, rich Cu area will crack easily.
文章引用: 黄鸿翔 , 陈尚达 , 吴勇芝 (2015) Ni含量梯度变化的Cu-Ni合金力学性能分子动力学模拟。 材料科学， 5， 151-157. doi: 10.12677/MS.2015.54021
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