Primary Creep Behaviour of Two-Phase Titanium Alloy with Various Microstructure

Archives of Metallurgy and Materials

W. Ziaja¹  M. Motyka¹  K. Kubiak¹  J. Sieniawski¹ 

[1] Rzeszow University of Technology, Department of Materi als Science, 12 P owsta?ców Warszawy Av., 35-959 Rzeszow, Poland

关键词: Keywords: two-phase titanium alloys;    microstructure;    finite element method;    primary creep;   

DOI  :  10.1515/amm-2016-0116

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Creep and fatigue properties of two-phase titanium alloys show strong dependence on microstructure, especially morphology of the α and β phases which can be controlled to certain extent by proper selection of hot working and heat treatment conditions. In the paper the creep behaviour of Ti-6Al-2Mo-2Cr alloy (VT3-1) at elevated temperature was modelled. Finite element analyses of primary creep stage were carried out taking into account some microstructural features of the two-phase alloy that were included in the physical model and different properties of α and β phases. In order to verify results of calculations distinct types of microstructure were developed in the alloy by heat treatment and creep tests were carried out at elevated temperature (450°C) at various stress levels. Based on the FEM simulations the effect of changes of some microstructure features on primary creep strain development was estimated.

【 授权许可】

Unknown