FLOW INSTABILITIES AND FRACTURE IN TI-6AL-4V DEFORMED IN COMPRESSION AT 298 K TO 673 K

被引：54

作者：

KAILAS, SV ^{[1
]}

PRASAD, YVRK ^{[1
]}

BISWAS, SK ^{[1
]}

机构：

[1] INDIAN INST SCI,DEPT MET,BANGALORE 560012,KARNATAKA,INDIA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1994年 / 25卷 / 10期

关键词：

D O I：

10.1007/BF02652318

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Uniaxial compression tests were conducted on Ti-6Al-4V specimens in the strain-rate range df 0.001 to 1 s(-1) and temperature range of 298 to 673 K. The stress-strain curves exhibited a peak flow stress followed by flow softening. Up to 523 K, the specimens cracked catastrophically after the flow softening started. Adiabatic shear banding was observed in this regime. The fracture surface exhibited both mode I and II fracture features. The state of stress existing in a compression test specimen when bulging occurs is responsible for this fracture. The instabilities observed in the present tests are classified as ''geometric'' in nature and are state-of-stress dependant, unlike the ''intrinsic'' instabilities, which are dependant on the dynamic constitutive behavior of the material.

引用

页码：2173 / 2179

页数：7

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