Structure and Mechanical Properties of Coatings Fabricated by Nonvacuum Electron Beam Cladding of Ti-Ta-Zr Powder Mixtures.

Autor: Samoylenko, Vitaliy V., Lenivtseva, Olga G., Polyakov, Igor A., Laptev, Ilya S.
Předmět:
Zdroj: AIP Conference Proceedings; 2015, Vol. 1683 Issue 1, p020198-1-020198-4, 4p, 1 Color Photograph, 1 Black and White Photograph, 1 Chart
Abstrakt: In this paper structural investigations and mechanical tests of Ti-Ta-Zr coatings obtained on surfaces of cp-titanium workpieces were carried out. It was found that the coatings had a dendrite structure; investigations at high-power magnifications revealed a platelet structure. An increase of tantalum concentration led to refinement of structural components. The microhardness level of all coatings, excepting a specimen with the maximum tantalum content, was 370 HV. The microhardness of this coating reached 400 HV. The ultimate tensile strength of cladded layers varied from 697 to 947 MPa. Adhesion tests showed that bimetallic composites were characterized by high bond strength of cladded layers to the substrate, which exceeded cp-titanium strength characteristics. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index