Effect of Pre-Rolling Strategy and Aging Precipitation Behaviors on Mechanical Properties and Wear Resistance of Biomedical Ti-15Mo Alloy

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-11-13 DOI:10.1007/s12540-024-01837-z

Shanshan Zhang, Tiewei Xu, Binjiang Lv, Wei Sun, Fazhan Yang

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Abstract

The precipitation behaviors of aging (A) were investigated in Ti-15Mo alloy after solution treatment (ST), unidirectional rolling (Uni-R) and bidirectional rolling (Bi-R). The results indicate that pre-rolling followed aging treatment could obtain fine α precipitates and improve the performance of the alloy. Numerous ω phases and sub-structures were induced in the alloy via the Uni-R or Bi-R process, increasing the amount of precipitation nucleation and inhibiting the coarsening of α phases. The strength and wear resistance of Uni-R-A and Bi-R-A samples are higher than that of the ST-A sample, revealing that pre-rolling strategies have the positive effect on microstructural refinement and performance. Compared with Bi-R process, the sub-structures formed in Uni-R process present more {332} twin characteristics, and facilitate to homogenous aging precipitation. The excellent combination performance was obtained in the Uni-R-A alloy with a highest ultimate tensile strength at 1270 MPa, and a lowest worn loss at 2.14 × 10⁷ µm³.

Graphical Abstract

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预轧策略和时效析出行为对医用Ti-15Mo合金力学性能和耐磨性的影响

研究了Ti-15Mo合金在固溶处理（ST）、单向轧制（Uni-R）和双向轧制（Bi-R）后时效(A)的析出行为。结果表明，预轧后时效处理可获得细小的α析出物，提高了合金的性能。通过Uni-R或Bi-R工艺在合金中诱导出大量ω相和亚结构，增加了析出形核的数量，抑制了α相的粗化。Uni-R-A和Bi-R-A试样的强度和耐磨性均高于ST-A试样，表明预轧策略对微观组织细化和性能有积极影响。与Bi-R工艺相比，Uni-R工艺形成的子结构更具{332}孪晶特征，有利于均匀时效析出。Uni-R-A合金获得了优异的组合性能，极限抗拉强度最高为1270 MPa，磨损损失最低为2.14 × 107µm3。图形抽象

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.