Strain hardening and fracture of VT6 alloy synthesized by the method of powder metallurgy

被引：3

作者：

Dekhtyar, O. I. ^{[1
]}

Matviichuk, M. V. ^{[1
]}

Moiseeva, I. V. ^{[1
]}

Savvakin, D. H. ^{[1
]}

机构：

[1] Ukrainian Acad Sci, Kurdyumov Inst Phys Met, Kiev, Ukraine

来源：

MATERIALS SCIENCE | 2008年 / 44卷 / 03期

关键词：

Titanium Alloy; Strain Hardening; Powder Metallurgy; Lamellar Structure; Powder Material;

D O I：

10.1007/s11003-008-9097-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the deformation behavior of VT6 alloy produced by the method of powder metallurgy and according to the traditional technology (casting and high-temperature deformation). It is shown that, in both types of materials, the evolution of the dislocation structure and strain hardening in tension obey the same physical laws. The deformation and hardening of both the powder material and VT6 alloy with lamellar structure obtained by using the traditional technology are controlled by the beta-phase with bcc lattice according to the mechanism of composition hardening. Independently of the temperature of sintering, powder alloys fail according to the mechanism of ductile shear and tension. The residual pores in the powder material do not play the role of sites of crack initiation.

引用

页码：429 / 434

页数：6