Effect of Nb addition on microstructure,mechanical properties and castability of β-type Ti-Mo alloys  

Nb元素对β型Ti-Mo基合金显微组织、力学性能和铸造性能的影响（英文）

作　　者：张令波[1] 王可铮[2] 徐丽娟[3] 肖树龙[3] 陈玉勇[3] 

机构地区：[1]哈尔滨医科大学附属第二医院口腔科,哈尔滨150086 [2]哈尔滨医科大学附属第四医院放射科,哈尔滨150001 [3]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第7期2214-2220,共7页中国有色金属学报（英文版）

基　　金：Project(QN2010-04)supported by the Youth Startup Fund of the Second Affiliated Hospital of Harbin Medical University,China;Project(2010-156)supported by the Medical Scientific Research Foundation of Heilongjiang Province Health Department,China;Project(HIT.NSRIF.2012002)supported by the Fundamental Research Funds for the Central Universities,China

摘　　要：To develop novel β-type biomedical titanium alloys,a series of Ti-15Mo-xNb alloys（x=0,5,10 and 15,mass fraction in%） were designed and prepared by using vacuum arc melting method.The present study focused on the effect of Nb addition on the microstructure,mechanical properties and castability of Ti-15 Mo alloy.Phase analysis and microstructure observation show that all the alloys consist of single β phase and the equiaxed β grain is refined with increasing Nb content.These β-type Ti-15Mo-xNb alloys exhibit good plasticity and rather low compression elastic modulus（in the range of 18.388-19.365 GPa）.After Nb addition,the compression yield strength of the alloys increases.With increasing Nb content,the micro-hardness of the alloys decreases.The alloys exhibit obvious fibrous strip microstructure after cold compression deformation.The castability test shows that the castability of the alloys after Nb addition decreases and that of the Ti-15 Mo alloy is the highest（92.01%）.为了开发新型的生物医用β型钛合金,设计并采用电弧熔炼方法制备Ti-15Mo-xNb（x=0.5,10和15,质量分数,%）合金,研究添加元素Nb对4种合金显微组织、力学性能和铸造性能的影响。相分析和组织观察结果表明,4种合金均由单一的β相组成,随着Nb含量的增加,合金的显微组织细化。β型Ti-15Mo-xNb合金具有较高的塑性和相当低的压缩弹性模量（18.388-19.365 GPa）。添加Nb元素后,合金的压缩屈服强度增高,随着Nb含量的增加,合金的显微硬度降低。在冷压缩变形后,4种合金均呈现明显的纤维带状组织。4种合金的充型实验表明：添加Nb元素后,合金的充型能力降低,Ti-15Mo合金的充型性能（92.01%）最好。

关 键 词：β-titanium alloys Ti-Mo-Nb NB CASTABILITY MICROSTRUCTURE mechanical properties 

分 类 号：TG146.23[一般工业技术—材料科学与工程]