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Fatigue behavior of ultrafine-grained Ti-24Nb-4Zr-8Sn multifunctional biomedical titanium alloy
Z. B. Zhang; Y. L. Hao; S. J. Li; R. Yang
2013
Source PublicationMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN0921-5093
Volume577Pages:225-233
AbstractA multifunctional titanium alloy Ti-24Nb-4Zr-8Sn (wt%) was fabricated by warm swaging and rolling to get homogeneous microstructure with ultrafine-grained (UFG) beta phase and nanostructured (NS) alpha phase, and their stress-controlled high cycle fatigue (HCF) and strain-controlled low cycle fatigue (LCF) behaviors were investigated in the study. The results showed that the UFG alloy exhibits much higher HCF strength than that of the hot-rolled alloy with coarse grains whereas its LCF endurance is worse slightly. This was explained by its stable microstructure originated from low homologous temperature being similar to 0.15 of melting temperature and the improvement of phase stability by grain refinement and NS precipitations. The former leads to dynamic recovery instead of dynamic recrystallization occurring in other UFG materials while the latter results in comparable cyclic stress stability with the hot-rolled alloy. The study also found that the shear bands have an identical angle of similar to 26 degrees with the loading direction, which is independent of the strain ratios. Since the ductile UFG alloy has a nonlinear elastic deformation behavior with large recoverable strain, its LCF endurance is much better than those of other materials exhibiting linear elasticity and would be further improved by the depression of NS precipitation. (C) 2013 Elsevier B.V. All rights reserved.
description.department[zhang, z. b. ; hao, y. l. ; li, s. j. ; yang, r.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; hao, yl (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; ylhao@imr.ac.cn
KeywordGrain Refinement Titanium Alloy Fatigue Cyclic Stability Shear Band Severe Plastic-deformation High-pressure Torsion Microstructural Evolution Cyclic Deformation Nanostructured Materials Copper Refinement Aluminum Ecap Ductility
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71700
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Z. B. Zhang,Y. L. Hao,S. J. Li,et al. Fatigue behavior of ultrafine-grained Ti-24Nb-4Zr-8Sn multifunctional biomedical titanium alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2013,577:225-233.
APA Z. B. Zhang,Y. L. Hao,S. J. Li,&R. Yang.(2013).Fatigue behavior of ultrafine-grained Ti-24Nb-4Zr-8Sn multifunctional biomedical titanium alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,577,225-233.
MLA Z. B. Zhang,et al."Fatigue behavior of ultrafine-grained Ti-24Nb-4Zr-8Sn multifunctional biomedical titanium alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 577(2013):225-233.
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