高强韧钛合金组成相成分和形态的精细调控
杨锐, 马英杰, 雷家峰, 胡青苗, 黄森森

Toughening High Strength Titanium Alloys Through Fine Tuning Phase Composition and Refining Microstructure
YANG Rui, MA Yingjie, LEI Jiafeng, HU Qingmiao, HUANG Sensen
图1 第一性原理计算得到的α-Ti-xAl二元合金柱面及基面<a>位错滑移临界剪切应力随Al含量的变化,以及实验测得的Ti-xAl合金屈服强度及断裂韧性随Al含量的变化[7]
Fig.1 Peierls stress (single dislocation critical resolved shear stress, CRSS) τ of Ti-xAl alloys plotted as functions of composition for the relaxed VASP-SQS calculations (a) and mechanical properties of Ti-xAl alloy as functions of Al concentration from experimental measurements (b) (VASP—vienna ab initio simulation package, SQS—special quasirandom structure, τap—CRSS of the prismatic <a> slip, τab—CRSS of the basal <a> slip)[7]