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, 2003, 255(6): 617-628. [2]Rondelli G, Vicentini B. Localized corrosion behavior in simulated human body fluids of commercial Ni-Ti orthodontic wires[J]. Bimaterials, 1999, 20(8): 785-792. [3]Wu S K...]Miyazaki S, Otsuka K. Deformation and transition behavior associated with the R-phase in Ti-Ni alloys[J]. Metallurgical Transaction, 1986, 17A(1): 53-63. [19]Zhu J S. Relaxation peak near 200K......
, thermodynamically stable α phase is harmful for ductility of Ti-Mo-Nb-V-Al alloy, but metastable Ti3Ni4 phase is effective for R phase transformation, martensitic transformation and superelasticity of Ni-rich TiNi... for Ti-rich TiNi, Ni-rich TiNi or Ti-Mo based SMAs precipitated or redissolved during medium temperature thermomechanical process, which have strong effect on the matrix component contents, phase......
,但是这些方法存在成本高,工艺复杂,操作难等问题,甚至会出现因为改性层与基体结合强度不高而导致脱落的现象[3-4].因此,开发新一代不含Ni的新型钛基形状记忆合金成为生物金属材料领域研究的热点.亚稳态β相钛合金由于具有较高的抗腐蚀性,良好的生物相容性,较高的屈服强度和较低的弹性模量而受到生物医用材料界的青睐[5].而且在一些含有β相稳定元素并具有生物相容性的二元β钛合金体系中,如Ti-Mo[6... titanium alloys[J]. Metallic Functional Materials, 2011, 18(2): 70-73. [7] 贺志荣, 周敬恩, 宫崎修一. 固溶时效态Ti-Ni合金相变行为与Ni含量的关系[J]. 金属学报, 2003, 39(6): 617-622.HE Zhi-rong, ZHOU Jin-en, MIYAZAKI S. Relationship between......
:采用电弧熔炼Ti,Ni和B的方法,原位合成B含量不同的3种NiTi-TiB2复合材料,对复合材料的显微组织,成分及压缩力学性能进行研究.结果表明:材料中NiTi与TiB2之间为冶金结合,结合界面致密无孔隙,克服了以往研究中非原位复合材料常见的界面结合差以及致密度低等缺点.当B的摩尔分数超过6%以后,组织中出现粗大的Ti2Ni脆性枝晶,并伴随材料压缩性能的降低.样品力学性能的恶化与粗大TiB2陶瓷以... contents were prepared by arc melting of Ti, Ni and B. The microstructure, composition and compress property were tested. The results show that TiB2 ceramic phase disperses in NiTi shape memory alloy......
more, Cu-Ni-Sn alloys with high Sn content have wide ranges of solidification, which would lead to detrimental solute segregation easily during conventional melting and casting process [18]. In the Ti... in Ti-Ni binary alloys, the introduction of soft phases is an effective way to improve the mechanical properties of brittle materials [19]. Therefore, the higher ductility in the Cu-15Ni-8Sn-0.3Nb alloy......
A, 1990, 61: 785-800. [5] 王 鹏, 李 军, 林崇智, 杨 柳,彭 琳, 王 莹, 肖 聪, 陈敬超. Ti-Ni金属间化合物电子结构与力学性质的第一性原理计算[J]. 中国有色金属学报, 2016, 26(12): 2546-2554. WANG Peng, LI Jun, LIN Chong-zhi, YANG Liu, PENG Lin, WANG Ying, XIAO Chong, CHEN Jing-chao. First-principles calculations of electronic structure and mechanical properties of Ti-Ni intermetallic compounds[J]. The Chinese Journal of Nonferrous Metals, 2016, 26(12......
磁性的轴承材料就显得尤为重要.为此,自2004年以来,NASA就着手开发TiNi金属间化合物轴承材料,其中TiNi60合金因其优异的综合性能,备受科研人员的青睐[2]. TiNi60合金是一种含Ti 40%,Ni 60%(质量分数)的有序金属间化合物,其特点是弹性模量低,硬度大,比强度高,无磁性,尺寸稳定性好,耐腐蚀性强且具有良好的可润滑性[2-4],被认为是能够在腐蚀介质中长寿命服役的高端轴承...弹性等,具体如下. 1.1.1 熔炼与加工 TiNi60合金是一种含CsCl型B2立方晶体结构母相的有序金属间化合物.如图1所示,立方单晶胞中,钛原子位于立方体中心,八个镍原子位于八个顶点.Ti-Ni间通过共用电子对形成的共价键使其既有部分陶瓷的特性,又有金属材料的弹性和塑性[7],与传统金属材料相比,拥有无可比拟的性能优势.然而,共价键的存在使其难以加工,曾一度阻碍了应用方面的研究......
] OTSUKA K, REN Xiao-bin. Physical metallurgy of Ti-Ni-based shape memory alloys [J]. Progress in Materials Science, 2005, 50: 511-678. [2] BAHADOR A, HAMAZAH E, KONDOH K, ASMA ABUBAKAR T, YUSOF F, UMEDA J, SAUD S N, IBRAHIM M K. Microstructure and superelastic properties of free forged Ti-Ni shape-memory alloy [J]. Transactions of Nonferrous Metals Society of China, 2018, 28(3): 502-514. [3] JIANG Shu......
能特性-表观弹性模量的可调控特性. 1 实验 采用备有水冷铜坩埚的真空电弧熔炼炉(电弧熔炼炉来自中国科学院沈阳科学仪器研制中心有限公司生产,真空度为10-3 Pa),将Ti,Ni和Nb(纯度分别为99.8%,99.96%和99.9%,质量分数)熔炼获得名义成分为52Nb-25Ti-23Ni(摩尔分数,%)的合金锭.合金铸锭经950 ℃均匀化退火处理10 h后,再辅以热锻 (热锻温度为...验机进行力学性能测试,加,卸载速率均为0.3 m/min. 2 结果与讨论 2.1 显微组织与相变 将NiTiNb铸锭加工成直径0.5 mm的丝材后,其纵截面显微组织如图1(a)所示.经能谱分析,照片中的条形白色部分为NbTi相(83.4% Nb；15.3% Ti；1.3% Ni(摩尔分数)),而细长的黑色部分为近等原子比的NiTi记忆合金相.可见,经过拔丝加工后,样品中的......
TiNi,Al3Ni2,Ti3Al和TiAl组成,先后顺序为776 K以下,Ti-Ni-Al焊接界面金属间化合物形成的顺序是Al3Ni2→TiNi→TiAl→Ti3Al,776 K以上时生成顺序为Al3Ni2→TiNi→Ti3Al→TiAl,并获得了界面IMC层的生长动力学模型.界面IMC层的厚度均随着温度的提高或保温时间的延长而增加.添加锌的接头的剪切强度由未热处理时的154 MPa提高到194 MPa,而添加钎料镍的接头由...;不同温度及保温时间下添加钎料镍时Ti/Al界面的微观形貌 Fig. 5 Microstructure morphologies of Ti/Al interface annealing at different temperatures and holding time by adding filler Ni 表4 添加钎料Ni时不同退火条件下特殊位置的化学成分......
