Thermo-mechanical characterization and dynamic failure of near α and near β titanium alloys

被引：31

作者：

Zhang, L. H. ^{[1
]}

Rittel, D. ^{[1
]}

Osovski, S. ^{[1
]}

机构：

[1] Technion, Fac Mech Engn, IL-32000 Haifa, Israel

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 729卷

基金：

以色列科学基金会;

关键词：

Ti-55511; Ti3Al2.5; V; Kolsky bar; Infrared; Taylor-Quinney coefficient; Dynamic shear failure; ADIABATIC SHEAR LOCALIZATION; TAYLOR-QUINNEY COEFFICIENT; COMPRESSION SPECIMEN; NUMERICAL VALIDATION; TI-6AL-4V ALLOY; PLASTIC WORK; STRAIN-RATE; TI-ALLOY; MICROSTRUCTURE; HEAT;

D O I：

10.1016/j.msea.2018.05.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper investigates the thermo-mechanical response and failure behaviour of near beta Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) and near alpha Ti3Al2.5 V alloy under high strain rate loading. A series of dynamic compression and shear compression tests have been performed, using a high-speed infrared detector synchronized with a Kolsky bar (split Hopkinson pressure bar). The results show that Ti-55511 presents a higher flow stress with little strain hardening, as opposed to Ti3Al2.5 V. The measured temperature rise preceding the onset of load drop is modest and insufficient to trigger thermal instabilities. Near alpha Ti3Al2.5 V is characterized by a higher Taylor-Quinney coefficient-beta(int), which is close to similar to 0.6 compared to similar to 0.35 for near beta Ti-55511. Microstructural examination reveals that both alloys fail by dynamic shear localization.

引用

页码：94 / 101

页数：8

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