Microstructure evolution and mechanical property of powder metallurgy Ti6Al4V alloy with high oxygen concentrations

IF 1.9 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Powder Metallurgy Pub Date : 2022-11-02 DOI:10.1080/00325899.2022.2141095
Yang Zhou, Fang Yang, Cun-guang Chen, Zhimeng Guo
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引用次数: 0

Abstract

ABSTRACT High oxygen Ti6Al4V alloys are fabricated by vacuum sintering and hot rolling using hydrogenation-dehydrogenation Ti6Al4V powder and ZrO2 powder as raw materials. The complete dissolution of oxygen and zirconium atoms results in an increase in lattice constant and strength. As-rolled Ti64-ZrO2 sample exhibits a bimodal structure with a fine acicular α phase of around 1 μm. Ti64-0.75 ZrO2 alloy with equivalent oxygen content close to 0.6 wt.-% presents a good combination of the high tensile strength (1180.2 MPa) and sufficient elongation (7.3%). Therefore, the critical oxygen content for the ductile-to-brittle transition of powder metallurgy Ti6Al4V alloy can be improved by suitable preparation methods. The formation of a fine β transformation structure may be one of the reasons for maintaining sufficient ductility.
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高氧浓度粉末冶金Ti6Al4V合金的组织演变与力学性能
摘要以Ti6Al4V粉末和ZrO2粉末为原料,采用真空烧结和热轧的方法制备了高氧Ti6Al4V合金。氧和锆原子的完全溶解导致晶格常数和强度的增加。轧制态Ti64-ZrO2样品表现出双峰结构,细针状α相约为1 μm。等效氧含量接近0.6wt.-%的Ti64-0.75ZrO2合金呈现出高拉伸强度(1180.2 MPa)和足够的伸长率(7.3%)。因此,通过合适的制备方法可以提高粉末冶金Ti6Al4V合金的韧脆转变的临界氧含量。精细β转变结构的形成可能是保持足够延展性的原因之一。
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来源期刊
Powder Metallurgy
Powder Metallurgy 工程技术-冶金工程
CiteScore
2.90
自引率
7.10%
发文量
30
审稿时长
3 months
期刊介绍: Powder Metallurgy is an international journal publishing peer-reviewed original research on the science and practice of powder metallurgy and particulate technology. Coverage includes metallic particulate materials, PM tool materials, hard materials, composites, and novel powder based materials.
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