激光增材制造异构钛合金的力学性能及其变形机理

doi:10.11896/cldb.25020116

材料导报

2026, Vol. 40

Issue (6): 25020116-7 https://doi.org/10.11896/cldb.25020116

金属与金属基复合材料

激光增材制造异构钛合金的力学性能及其变形机理

胡一雄¹, 邓方², 张柯康¹, 孟锦晖³, 赵枫⁴, 刘洋^1,*

1 宁波大学机械工程与力学学院,浙江宁波 315211;
2 江西应用技术职业学院汽车学院,江西赣州 341000;
3 陕西飞机工业有限责任公司,陕西汉中 723213;
4 浙江天钛增材制造技术有限公司,浙江宁波 315200

Mechanical Properties and Deformation Mechanisms of Laser Additive Manufactured Heterogeneous Titanium Alloys

HU Yixiong¹, DENG Fang², ZHANG Kekang¹, MENG Jinhui³, ZHAO Feng⁴, LIU Yang^1,*

1 School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, Zhejiang, China;
2 School of Automotive, Jiangxi College of Applied Technology, Ganzhou 341000, Jiangxi, China;
3 AVIC Shaanxi Aircraft Industrial Co., Ltd., Hanzhong 723213, Shaanxi, China;
4 Zhe Jiang Tiny Titanium AM Technology Co., Ltd., Ningbo 315200, Zhejiang, China

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摘要在Ti-6Al-4V(TC4)钛合金粉末中添加适当的316L粉末,并通过激光选区熔化增材制造工艺调控其微观组织,获得了异构钛合金。发现在4.5%(质量分数)316L含量下可获得综合压缩力学性能最优的异构钛合金(TC4-4.5SS);而2% 316L含量下能得到抗压强度明显增强的异构钛合金(TC4-2SS),但其塑性无增强。TC4-4.5SS异构钛合金稳定元素含量较高,浓度梯度明显,导致渐进性应变诱导马氏体相变从而增塑;而TC4-2SS异构钛合金由于β相稳定元素不足,在加载过程中会诱发大范围的相变行为,进而表现出更为显著的加工硬化现象。

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关键词: 激光增材制造异构钛合金力学性能 β相含量相变

Abstract: Heterogeneous titanium alloys were fabricated by incorporating an appropriate amount of 316L powder into Ti-6Al-4V(TC4) titanium alloy powder, with the microstructure precisely modulated through in-situ laser powder bed fusion(LPBF). It was found that heterogeneous titanium alloys containing 4.5% 316L(TC4-4.5SS) exhibit the optimal combination of compressive mechanical properties, while the alloy with 2% 316L(TC4-2SS) shows a significant improvement in compressive strength without a corresponding enhancement in plasticity. The TC4-4.5SS alloy exhibits an increased content of stabilizing elements and a pronounced concentration gradient, which promotes progressive strain-induced martensitic transformation and enhanced plasticity. In contrast, the TC4-2SS alloy contains insufficient stabilizing elements in the β phase. As a result, extensive simultaneous phase transformations occurred during loading, leading to more pronounced work hardening.

Key words: laser additive manufacturing heterogeneous titanium alloy mechanical property β phase content phase transition

出版日期: 2026-03-25 发布日期: 2026-04-03

ZTFLH:

TG146.2

基金资助: 国家自然科学基金(52375347);宁波市自然科学基金重点项目(2023J008)

通讯作者: ^*刘洋,宁波大学机械工程与力学学院教授、博士研究生导师。目前主要从事激光增材制造(3D打印)、激光加工、智能制造技术等方面的研究。liuyang1@nbu.edu.cn

作者简介: 胡一雄,宁波大学机械工程与力学学院硕士研究生,主要研究领域为金属材料增材制造。

引用本文:

胡一雄, 邓方, 张柯康, 孟锦晖, 赵枫, 刘洋. 激光增材制造异构钛合金的力学性能及其变形机理[J]. 材料导报, 2026, 40(6): 25020116-7.
HU Yixiong, DENG Fang, ZHANG Kekang, MENG Jinhui, ZHAO Feng, LIU Yang. Mechanical Properties and Deformation Mechanisms of Laser Additive Manufactured Heterogeneous Titanium Alloys. Materials Reports, 2026, 40(6): 25020116-7.

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https://www.mater-rep.com/CN/10.11896/cldb.25020116 或 https://www.mater-rep.com/CN/Y2026/V40/I6/25020116

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