激光增材制造近β钛合金显微组织与力学性能研究

李海涛; 齐敏; 陈冬梅; 黄森森; 王倩; 马英杰; 雷家峰

激光增材制造近β钛合金显微组织与力学性能研究

1. 中航工业沈阳飞机设计研究所, 辽宁沈阳 110035;
2. 中国科学院金属研究所, 辽宁沈阳 110016

基金项目:

国家重点研发计划(2021YFC2801801)

详细信息

作者简介:
李海涛,男,1978年生,主要从事金属结构材料及应用技术研究。E-mail:leastaony@163.com

通讯作者:
马英杰,男,1981年生,主要从事结构钛合金研究。E-mail:yjma@imr.ac.cn

中图分类号: TG146.23
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出版历程
- 收稿日期: 2023-07-13

Study on Microstructure and Mechanical Properties of Laser Metal Deposition Near β Titanium Alloy

1. Avic Shenyang Aircraft Design & Research institute, Shenyang 11035, China;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 11016, China

摘要

摘要: 研究了激光沉积打印Ti55511钛合金的显微组织和室温拉伸性能,表征了打印态、热处理态Ti55511合金的晶粒形态及晶体学织构,分析了不同退火热处理温度对激光增材制造钛合金强塑性的影响。结果表明,原始打印态Ti55511钛合金由粗大的β晶粒组成,并且β晶粒以柱状晶和等轴晶两种类型的晶粒交替生长,呈现竹节状形态。在打印态Ti55511组织中,β基体析出的α片层提供了大量的界面,有效阻碍了位错运动,使合金具有高强度和低塑性。580 ℃退火热处理后,合金的屈服强度、抗拉强度变化不明显,伸长率有一定的提升。进一步提高退火温度至620 ℃后,合金的屈服强度、抗拉强度降低,但强度值依然大于1 000 MPa,同时伸长率大幅提升。因此,可通过退火热处理调控α晶粒的尺寸和体积分数,以提高合金的强塑性匹配。当应力平行于Z方向时,样品的屈服强度、抗拉强度略低于垂直于Z方向的,而伸长率显著高于应力垂直于Z方向的。
- Ti55511钛合金 /
- 增材制造 /
- 显微组织 /
- 力学性能
Abstract: The microstructure and tensile properties at room temperature of the laser additive manufacturing Ti55511 titanium alloy are studied, the grain morphologies and crystallographic texture of the as-deposited and heat treated Ti55511 titanium alloy are characterized, and the effects of different annealing temperatures on plasticity of the laser additive manufactured Ti55511 titanium alloy are analyzed. The results indicate that the as-deposited Ti55511 titanium alloy consists of coarse β grains, and the β grains grow alternately in the form of columnar and equiaxed grains, presenting a bamboo-like morphology. In the as-deposited Ti55511 titanium alloy, the α lamellae precipitated from the β matrix provides a large number of interfaces, effectively hindering the movement of dislocations, and allows the alloy having high strength and low plasticity. The yield strength and tensile strength of the alloy annealed at 580 ℃ does not show significant changes, and the elongation increases to a certain extent. When the annealing temperature increases to 620 ℃, the yield strength and tensile strength of the alloy reduce, still greater than 1 000 MPa, and the elongation significantly increases. Therefore, the size and volume fraction of the α grains can be regulated through the annealing heat treatment to improve the strength and toughness balance of the alloy. When the stress is parallel to the Z deposition direction, the yield strength and tensile strength of the specimen are slightly lower than those of the specimen whose stress is perpendicular to the Z deposition direction, and the elongation is significantly higher than that of the specimen whose stress is perpendicular to the Z deposition direction.
- Ti55511 titanium alloy /
- additive manufacturing /
- microstructure /
- mechanical property

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参考文献(27)

[1]	王欣, 罗学昆, 宇波, 等. 航空航天用钛合金表面工程技术研究进展[J]. 航空制造技术, 2022, 65(4): 14-24.
[2]	吝媛, 杨奇, 黄拓, 等. Ti9148钛合金β-相晶粒长大行为[J]. 有色金属科学与工程, 2022, 13(2): 93-97.
[3]	任德春, 苏虎虎, 张慧博, 等. 冷旋锻变形对TB9钛合金显微组织和拉伸性能的影响[J]. 金属学报, 2019, 55(4): 480-488.
[4]	PILCHAK A L, SARGENT G A, SEMIATIN S L. E-arly stages of microstructure and texture evolution during beta annealing of Ti-6Al-4V[J]. Metallurgical and Materials Transactions A, 2018, 49(3): 908-919.
[5]	IVASISHIN O M, MARKOVSKY P E, MATVIYC-HUK Y V, et al. A comparative study of the mechanical properties of high-strength β-titanium alloys[J]. Journal of Alloys and Compounds, 2008, 457(1-2): 296-309.
[6]	IVASISHIN O M, MARKOVSKY P E, SEMIATIN S L, et al. Aging response of coarse- and fine-grained β titanium alloys[J]. Materials Science and Engineering: A, 2005, 405(1-2): 296-305.
[7]	KARASEVSKAYA O P, IVASISHIN O M, SEMIA-TIN S L, et al. Deformation behavior of beta-titanium alloys[J]. Materials Science and Engineering: A, 2003, 354(1-2): 121-132.
[8]	YANG X P, RICHARD LIU C. Machining titanium and its alloys[J]. Machining Science and Technolo-gy, 1999, 3(1): 107-139.
[9]	SCHWAB H, BÖNISCH M, GIEBELER L, et al. P-rocessing of Ti-5553 with improved mechanical properties via an in situ heat treatment combining selective laser melting and substrate plate heating[J]. Materials & Design, 2017, 130: 83-89.
[10]	WANG K, BAO R, LIU D, et al. Plastic anisotropy of laser melting deposited Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy[J]. Materials Science and Engineering: A, 2019, 746: 276-289.
[11]	WANG Z, XIE M S, LI Y Y, et al. Premature failure of an additively manufactured material[J]. NPG Asia Materials, 2020, 12: 30.
[12]	BERMINGHAM M J, KENT D, PACE B, et al. High strength heat-treatable β-titanium alloy for additive manufacturing[J]. Materials Science and Enginee-ring: A, 2020, 791: 139646.
[13]	LIU C M, TIAN X J, TANG H B, et al. Microstructural characterization of laser melting deposited Ti-5Al-5Mo-5V-1Cr-1Fe near β titanium alloy[J]. Journal of Alloys and Compounds, 2013, 572: 17-24.
[14]	ZHANG Q, CHEN J, ZHAO Z, et al. Microstructure and anisotropic tensile behavior of laser additive manufactured TC21 titanium alloy[J]. Materials Science and Engineering: A, 2016, 673: 204-212.
[15]	BRANDL E, BAUFELD B, LEYENS C, et al. Additive manufactured Ti-6Al-4V using welding wire: comparison of laser and arc beam deposition and evaluation with respect to aerospace material specifications[J]. Physics Procedia, 2010, 5: 595-606.
[16]	BAUFELD B, BRANDL E, VAN DER BIEST O. W-ire based additive layer manufacturing: comparison of microstructure and mechanical properties of Ti-6Al-4V components fabricated by laser-beam deposition and shaped metal deposition[J]. Journal of Materials Processing Technology, 2011, 211(6): 1146-1158.
[17]	LIU C M, WANG H M, TIAN X J, et al. Subtransus triplex heat treatment of laser melting deposited Ti-5Al-5Mo-5V-1Cr-1Fe near β titanium alloy[J]. Materials Science and Engineering: A, 2014, 590: 30-36.
[18]	席明哲, 高士友, 刘博, 等. 扫描方式和退火热处理对激光快速成形TA15钛合金组织与性能的影响[J]. 稀有金属材料与工程, 2014, 43(2): 445-449.
[19]	谷美邦. 热处理制度对激光增材制造TA15钛合金力学性能的影响[J]. 航空制造技术, 2021, 64(3): 97-102.
[20]	NANDWANA P, LEE Y, RANGER C, et al. Post-processing to modify the α phase micro-texture and β phase grain morphology in Ti-6Al-4V fabricated by powder bed electron beam melting[J]. Metallurgical and Materials Transactions A, 2019, 50(7): 3429-3439.
[21]	WANG F D, MEI J, WU X H. Microstructure study of direct laser fabricated Ti alloys using powder and wire[J]. Applied Surface Science, 2006, 253(3): 1424-1430.
[22]	YAN Z B, WANG K, ZHOU Y, et al. Crystallo-graphic orientation dependent crack nucleation during the compression of a widmannstätten-structure α/β titanium alloy[J]. Scripta Materialia, 2018, 156: 110-114.
[23]	SHI R, MA N, WANG Y. Predicting equilibrium sh-ape of precipitates as function of coherency state[J]. Acta Materialia, 2012, 60(10): 4172-4184.
[24]	BANERJEE D, WILLIAMS J C. Perspectives on titanium science and technology[J]. Acta Materialia, 2013, 61(3): 844-879.
[25]	FURUHARA T, TAKAGI S, WATANABE H, et al. Crystallography of grain boundary α precipitates in a β titanium alloy[J]. Metallurgical and Materials Transactions A, 1996, 27(6): 1635-1646.
[26]	LIU Z, QIN Z X, LIU F, et al. The microstructure and mechanical behaviors of the Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy produced by laser melting deposi-tion[J]. Materials Characterization, 2014, 97: 132-139.
[27]	ZHANG Y W, LI S J, OBBARD E G, et al. Elastic properties of Ti-24Nb-4Zr-8Sn single crystals with bcc crystal structure[J]. Acta Materialia, 2011, 59(8): 3081-3090.