Flow and fracture characteristics of near alpha titanium alloy

被引：22
作者：
Bobbili, Ravindranadh [1 ]
Madhu, Vemuri [1 ]
机构：
[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 684卷
关键词：
J-C model; Titanium alloy; SHTB; Triaxiality; HIGH-STRAIN RATES; ELEVATED-TEMPERATURES; STRESS TRIAXIALITY; TENSILE BEHAVIOR; TI-6AL-4V ALLOY; PART I; MODERATE TEMPERATURES; MECHANICAL-BEHAVIOR; STRUCTURAL-STEEL; ALUMINUM-ALLOY;
D O I：
10.1016/j.jallcom.2016.05.155
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
To understand the flow and fracture behavior of near-alpha titanium alloy, the influence of stress triaxiality and strain rate on the failure behavior of this alloy was considered. The combined effect of strain rate, temperature and stress triaxiality on the behavior was studied by testing both smooth and notched specimens. Johnson-Cook (J-C) constitutive and fracture models were established based on high strain rate tensile data obtained from Split hopkinson tension bar (SHTB) and quasi-static tests. The Johnson Cook constitutive and fracture models have been calibrated. A modified Johnsone-Cook model was established and proved to have high accuracy. The calibrated model has been validated by simulating the tension tests at various triaxialities using ANSYS autodyn software. Finite element simulations were used to predict the effective plastic strain versus triaxiality history within the deforming specimens. The fracture surfaces of specimens tested under various strain rates and temperatures were studied under scanning electron microscopy (SEM). (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：162 / 170
页数：9
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