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選區(qū)激光熔化及熱等靜壓制備Ti-25Ta合金微觀組織和力學(xué)性能
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1.廣東省科學(xué)院新材料研究所 國家鈦及稀有金屬粉末冶金工程技術(shù)研究中心 廣東省金屬強(qiáng)韌化技術(shù)與應(yīng)用重點實驗室，廣東 廣州 510650;2.大連大學(xué)附屬中山醫(yī)院，遼寧 大連 116001;3.北京科技大學(xué) 新金屬材料國家重點實驗室，北京 100083

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基金項目:

Key Realm R&D Program of Guangdong Province (2018B090904004), the State Key Lab of Advanced Metals and Materials (2022-Z16), the Key Research Pro-gram of Guangzhou (202206040001), the International Science and Technology Cooperation Program of Guangdong Province (2022A0505050025), the Guangdong Academy of Science Project of Science and Technology Development (2020GDASYL-20200504001，2022GDASZH-2022010107，2022GDASZH-2022010109), the National key research and development project (2022YFC2406000)


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

1.Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China;2.Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China;3.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

Fund Project:

Key Realm R&D Program of Guangdong Province (2018B090904004); Supported by 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, 2022GDASZH-2022010107, 2022GDASZH-2022010109); National Key Research and Development Project (2022YFC2406000)

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    摘要:

    采用選區(qū)激光熔化技術(shù)制備了Ti-25Ta合金樣品，并對打印件和熱等靜壓樣品的相對密度、顯微組織、顯微硬度和拉伸性能進(jìn)行了表征。結(jié)果表明，隨著激光功率的增加，掃描軌跡寬度和深度增加，表面形貌得到改善。經(jīng)熱等靜壓處理后，樣品最大致密度由95.31%提高到98.01%。同時，隨著輸入功率的增加，晶粒細(xì)化為板條馬氏體和胞狀晶粒。致密化處理后，亞晶粒合并，并形成大角度晶界。熱等靜壓穩(wěn)定了合金的顯微硬度，提高了合金的抗拉伸強(qiáng)度和伸長率。

    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.

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引用本文

蒲蕓娜,趙德偉,劉斌斌,施麒,李軍雷,譚沖,申正焱,謝煥文,劉辛.選區(qū)激光熔化及熱等靜壓制備Ti-25Ta合金微觀組織和力學(xué)性能[J].稀有金屬材料與工程,2024,53(8):2123~2130.[Pu Yunna, Zhao Dewei, Liu Binbin, Shi Qi, Li Junlei, Tan Chong, Shen Zhengyan, Xie Huanwen, Liu Xin. Microstructure Evolution and Mechanical Properties of Ti-25Ta Alloy Fabricated by Selective Laser Melting and Hot Isostatic Pressing[J]. Rare Metal Materials and Engineering,2024,53(8):2123~2130.]
DOI：10.12442/j. issn.1002-185X.20230703

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  • 收稿日期:2023-11-08
  • 最后修改日期:2023-12-15
  • 錄用日期:2024-01-05
  • 在線發(fā)布日期: 2024-08-09
  • 出版日期: 2024-08-08