Microstructural Evolution and Bio-corrosion Characteristics of Cold-Rolled Ti-6Al-4V Alloy Fabricated Through Selective Laser Melting for Implant Applications

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2024-08-26 DOI:10.1007/s11837-024-06810-0

B. G. Yashwanth Kumar, R. Lokesh Kumar, R. Vaira Vignesh, M. Govindaraju, G. Suganya Priyadharshini, Abd Baghad

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引用次数: 0

Abstract

The microstructural evolution, mechanical properties, and bio-corrosion behavior of Ti-6Al-4V alloys processed by cold rolling and annealing were investigated to address the need for improved biomedical implants. This study aimed to determine and compare these properties in cold-rolled and annealed cold-rolled SLM-fabricated Ti-6Al-4V specimens. The specimens AMCR01 and AMCR02 revealed elongated grains due to cold rolling and phase compositions of 73% α-Ti and 27% β-Ti in AMCR01, and 87% α-Ti and 13% β-Ti in AMCR02, with inhomogeneous β-Ti clustering. Microhardness tests showed increased hardness in cold-rolled specimens, while tensile tests indicated enhanced strength compared to annealed specimens, which exhibited reduced strength due to grain enlargement. Fractography revealed combined ductile and brittle fracture modes in both conditions. Immersion corrosion tests in SBF solution demonstrated enhanced corrosion resistance with an increased rolling reduction ratio, with annealed specimens showing the lowest corrosion rate. The surface morphology supported these findings, indicating the augmenting effect of cold rolling and annealing on corrosion resistance.

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通过选择性激光熔化制造的冷轧 Ti-6Al-4V 合金的微观结构演变和生物腐蚀特性，用于植入物应用

为了满足改进生物医学植入物的需求，研究人员对通过冷轧和退火处理的 Ti-6Al-4V 合金的微观结构演变、机械性能和生物腐蚀行为进行了调查。本研究旨在确定和比较冷轧和退火冷轧 SLM 制成的 Ti-6Al-4V 试样的这些特性。试样AMCR01和AMCR02显示出冷轧造成的细长晶粒，AMCR01的相组成为73% α-钛和27% β-钛，AMCR02的相组成为87% α-钛和13% β-钛，且存在不均匀的β-钛团聚。显微硬度测试表明，冷轧试样的硬度有所提高，而拉伸测试表明，与退火试样相比，冷轧试样的强度有所提高，而退火试样由于晶粒增大而强度降低。断裂图显示，在这两种条件下都存在韧性和脆性相结合的断裂模式。在 SBF 溶液中进行的浸泡腐蚀测试表明，随着轧减率的增加，抗腐蚀性增强，而退火试样的腐蚀率最低。表面形态证实了这些发现，表明冷轧和退火对耐腐蚀性有增强作用。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.