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主管单位 中华人民共和国
工业和信息化部
主办单位 中国材料研究学会
哈尔滨工业大学
主编 苑世剑 国际刊号ISSN 1005-0299 国内刊号CN 23-1345/TB

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引用本文:杨军,马文瑾,张家敏,杜立辉,易健宏,李凤仙,谈松林,甘国友.Al-V含量对TiH2粉制备钛基合金性能的影响[J].材料科学与工艺,2020,28(6):15-21.DOI:10.11951/j.issn.1005-0299.20190077.
YANG Jun,MA Wenjin,ZHANG Jiamin,DU Lihui,YI Jianhong,LI Fengxian,TAN Songlin,GAN Guoyou.Effect of Al-V content on properties of Ti-based alloys prepared by TiH2 powder[J].Materials Science and Technology,2020,28(6):15-21.DOI:10.11951/j.issn.1005-0299.20190077.
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Al-V含量对TiH2粉制备钛基合金性能的影响
杨军1,2,马文瑾3,张家敏1,2,杜立辉1,2,易健宏1,2,李凤仙1,2,谈松林1,2,甘国友1,2
(1.昆明理工大学 材料科学与工程学院,昆明 650093;2. 昆明市稀贵及有色金属先进材料重点实验室(昆明理工大学), 昆明 650093;3.莫纳什大学 材料科学与工程学院,墨尔本 3800)]
摘要:
为了揭示Al-V含量对钛基合金性能的影响,以TiH2粉、Ti粉为原料,制备不同含量铝、钒(质量分数:0,2.5%,5%,7.5%,10%)的钛合金试样,通过对样品的力学性能、物相、显微组织、断口形貌的分析,研究了铝钒含量对合金的微观组织和力学性能的影响。结果表明:两种原料对应烧结试样的相主要由密排六方结构α-Ti和少量的体心立方结构β-Ti构成,铝钒含量的增加对烧结样品物相的相对含量无明显影响,但XRD衍射峰稍向右偏移;纯TiH2和纯Ti烧结试样为等轴组织,加入铝、钒合金元素后纯TiH2粉对应的组织为片状组织,纯Ti粉对应的组织以等轴为主,随铝、钒的增加,对应组织形貌变化较小;纯TiH2和纯Ti烧结样品的抗拉强度分别为562.88和513.44 MPa,强度较低,但延伸率高,分别为28.15%和29.09%;随铝、钒含量的增加,TiH2和Ti对应样品的强度、硬度增加,延伸率下降,最大强度值分别为914.10和937.23 MPa,对应的延伸率分别为7.60%和10.89%。随铝钒含量的增加两类合金的脆性增加,塑性降低,加入铝钒后纯TiH2粉对应试样断口形貌主要呈条形花样和少量韧窝,纯Ti粉对应试样断口以韧窝为主。
关键词:  铝钒含量  TiH2  力学性能  粉末冶金  钛基合金
DOI:10.11951/j.issn.1005-0299.20190077
分类号:TG146.2+3
文献标识码:A
基金项目:国家自然科学基金资助项目(51464027).
Effect of Al-V content on properties of Ti-based alloys prepared by TiH2 powder
YANG Jun1,2, MA Wenjin3, ZHANG Jiamin1,2, DU Lihui1,2, YI Jianhong1,2, LI Fengxian1,2, TAN Songlin1,2, GAN Guoyou1,2
(1. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. Key Laboratory of Advanced Materials of Yunnan Province(Kunming University of Science and Technology), Kunming 650031, China; 3.Faculty of Material Science and Engineering, Monash University, Melbourne 3800,Australia)
Abstract:
To reveal the influence of Al-V content on the properties of titanium based alloys, Ti based alloy samples with different contents of Al and V (mass fraction: 0, 2.5%, 5%, 7.5%, 10%) were prepared from TiH2 powder and Ti powder. The effect of Al-V content on the microstructure and mechanical properties of the alloy was studied by analyzing the mechanical properties, phase, microstructure, and fracture morphology of the samples. The results show that the phase of the two raw materials is mainly composed of close packed hexagonal structure α-Ti and a small amount of body centered cubic structure β-Ti. The increase of aluminum and vanadium content has no obvious effect on the phase relative content of the sintered samples, but the XRD diffraction peak shifts slightly to the right. Pure TiH2 and pure Ti sintered samples are of equiaxed structure. After adding aluminum and vanadium elements, the corresponding structure of pure TiH2 powder is lamellar structure. The corresponding structure of pure Ti powder is mainly of equiaxed structure. With the increase of aluminum and vanadium, the morphology of corresponding structures changed little. The tensile strength of pure TiH2 and pure Ti sintered samples were 562.88 MPa and 513.44 MPa, respectively, and the corresponding elongation is 28.15% and 29.09%, respectively, indicating lower strength but higher elongation. With the increase of Al and V contents, the strength and hardness of TiH2 and Ti corresponding samples increase, and the elongation decrease. The maximum strength values are 914.10 MPa and 937.23 MPa, and the corresponding elongation is 7.60% and 10.89% respectively. With the increase of Al-V content, the brittleness increases and the plasticity decreases. The fracture morphology of pure TiH2 powder with Al-V content is mainly strip pattern and a few dimple. The fracture surface of pure Ti powder with Al-V content is mainly dimples.
Key words:  content of Al and V  TiH2  mechanical properties  powder metallurgy  Ti-based alloys

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