Impacts of yttrium on microstructure and tensile properties of biomedical β Ti-Nb-Zr fabricated by metal injection molding

Xu，Peng1; Pyczak，Florian1,2; Yan，Ming1,3; Kong，Fantao4; Ebel，Thomas1

2020-08-05

10.1016/j.msea.2020.139816

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

Impurities, particularly oxygen, are a critical issue to address in metal-injection-molding (MIM) processed Ti-Nb-Zr biomaterials. The addition of rare earth (RE) elements such as yttrium is a possible solution to the impurity problem due to their potential for scavenging oxygen. The impacts of added Y on the sinterability, microstructure and mechanical properties of the MIMed Ti-Nb-Zr, however, largely remain unclear. In this study, different sized Y particles with varying weight fractions have been added to the β Ti-Nb-Zr alloy in order to elucidate the aforementioned aspects. It has been found that, although the added Y has an obvious β grain refinement effect, its impacts on the residual porosity, ultimate tensile strength and tensile toughness can be significantly negative, particularly if using large sized Y particles. Small sized (<15 μm), moderate amount (e.g. 0.3 wt%) of Y addition, however, proved to be beneficial, in terms of scavenging oxygen and promoting fracture toughness. Characterization techniques and mechanical testing are employed to understand the above experimental findings with the assistance of sintering theory and existing literature. It is hoped that the present study can provide an important guidance for using Y as an oxygen scavenger to develop low-cost, high-performance MIMed Ti alloys.

Metal injection molding Oxygen scavenging Particle size Sinterability Titanium alloys Yttrium

SCI ; EI

英语

其他

Natural Science Foundation of China[51971108] ; Research and Development Program Project in Key Areas of Guangdong Province[2019B090907001]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000553980500037

ELSEVIER SCIENCE SA

20202808928510

Mechanical testing ; Microstructure ; Sintering ; Ternary alloys ; Injection molding ; Powder metallurgy ; Tensile strength ; Titanium alloys ; Oxygen ; Niobium alloys ; Rare earths ; Yttrium ; Grain refinement ; Fracture toughness

Titanium and Alloys:542.3 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Mechanical Variables Measurements:943.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85087718523

Scopus

1.Institute of Materials Research,Helmholtz Zentrum Geesthacht,Geesthacht,Max Planck Str. 1,D21502,Germany
2.Brandenburgisch Technische Universität Cottbus Senftenberg,Cottbus,Konrad Wachsmann Allee 17,D03046,Germany
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Ave,518055,China
4.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin,West Dazhi Road 92,150001,China

Xu，Peng,Pyczak，Florian,Yan，Ming,et al. Impacts of yttrium on microstructure and tensile properties of biomedical β Ti-Nb-Zr fabricated by metal injection molding[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,792.

Xu，Peng,Pyczak，Florian,Yan，Ming,Kong，Fantao,&Ebel，Thomas.(2020).Impacts of yttrium on microstructure and tensile properties of biomedical β Ti-Nb-Zr fabricated by metal injection molding.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,792.

Xu，Peng,et al."Impacts of yttrium on microstructure and tensile properties of biomedical β Ti-Nb-Zr fabricated by metal injection molding".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 792(2020).