王耀勉 Likes:

Affiliation of Author(s):

冶金工程学院

Journal:

Advanced Materials Research

Key Words:

中文关键字：表面纳米化; 力学性能; 模拟;强化;晶粒尺寸，英文关键字：Surface Nanocrystallization, Mechanical Property,

Abstract:

A constitutive model, adopting the modified Khan, Huang and Liang (KHL) viscoplastic model to describe plastic deformation of metallic materials with different grain sizes in the range of nanometers to micrometers at different strain rates, was presented to simulate the mechanical behavior of iron sample with nanocrystalline surface layer. Stress-strain curve and yield stress of the iron sample were calculated by means of this model. Influence of grain size distribution in the cross section was also investigated. The simulation results indicate that the yield stress can be increased after the formation of the nanocrystalline surface layer. And an increment of the fraction of the nanocrystalline layer can improve the yield stress further.

Note:

EI:20130616000975

Co-author:

Zhang,C.H.

First Author:

wangyaomian

Indexed by:

Journal paper

Volume:

卷：634-638

Issue:

期：1

Page Number:

页：2813-2817

Translation or Not:

no

Date of Publication:

2013-01-01