稀有金属材料与工程2024，Vol.53Issue(8) ：2123-2130.DOI:10.12442/j.issn.1002-185X.20230703

选区激光熔化及热等静压制备Ti-25Ta合金微观组织和力学性能

Microstructure Evolution and Mechanical Properties of Ti-25Ta Alloy Fabricated by Selective Laser Melting and Hot Isostatic Pressing

蒲芸娜 赵德伟 刘斌斌 施麒 李军雷 谭冲 申正焱 谢焕文 刘辛
稀有金属材料与工程2024，Vol.53Issue(8) ：2123-2130.DOI:10.12442/j.issn.1002-185X.20230703
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选区激光熔化及热等静压制备Ti-25Ta合金微观组织和力学性能

Microstructure Evolution and Mechanical Properties of Ti-25Ta Alloy Fabricated by Selective Laser Melting and Hot Isostatic Pressing

蒲芸娜 1赵德伟 2刘斌斌 3施麒 1李军雷 2谭冲 1申正焱 1谢焕文 1刘辛1
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作者信息

  • 1. 广东省科学院新材料研究所 国家钛及稀有金属粉末冶金工程技术研究中心 广东省金属强韧化技术与应用重点实验室,广东广州 510650
  • 2. 大连大学附属中山医院,辽宁 大连 116001
  • 3. 北京科技大学新金属材料国家重点实验室,北京 100083
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摘要

采用选区激光熔化技术制备了 Ti-25Ta合金样品,并对打印件和热等静压样品的相对密度、显微组织、显微硬度和拉伸性能进行了表征.结果表明,随着激光功率的增加,扫描轨迹宽度和深度增加,表面形貌得到改善.经热等静压处理后,样品最大致密度由95.31％提高到98.01％.同时,随着输入功率的增加,晶粒细化为板条马氏体和胞状晶粒.致密化处理后,亚晶粒合并,并形成大角度晶界.热等静压稳定了合金的显微硬度,提高了合金的抗拉伸强度和伸长率.

Abstract

Ti-25Ta alloy samples were fabricated by selective laser melting,and the relative density,microstructure,microhardness and tensile properties of the as-built and hot isostatic pressing(HIP)-prepared samples were characterized.Results show that the track width and penetration depth are increased with the increase in laser power,and the surface morphology is improved.The maximum relative density improves from 95.31％to 98.01％after HIP process.Moreover,the microstructure is refined into the lath martensite and cellular grains with the increase in input power.After densification treatment,the subgrain coalescence occurs and high angle grain boundaries are formed.In addition,HIP process stabilizes the microhardness and enhances the tensile strength and elongation.

关键词

Ti-25合金/选区激光熔化/热等静压

Key words

Ti-25Ta alloy/selective laser melting/hot isostatic pressing

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基金项目

Key Realm R&D Program of Guangdong Province(2018B090904004)

State Key Laboratory of Advanced Metals and Materials(2022-Z16)

Key Research Program of Guangzhou(202206040001)

International Science and Technology Cooperation Program of Guangdong Province(2022A0505050025)

Guangdong Academy of Science Project of Science and Technology Development(2020GDASYL-20200504001)

Guangdong Academy of Science Project of Science and Technology Development(2022GDASZH-2022010107)

Guangdong Academy of Science Project of Science and Technology Development(2022GDASZH-2022010109)

National Key Research and Development Project(2022YFC2406000)

出版年

2024
稀有金属材料与工程
中国有色金属学会,中国材料研究学会,西北有色金属研究院

稀有金属材料与工程

CSTPCDCSCD北大核心
影响因子：0.634
ISSN：1002-185X
参考文献量39
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