Tantalum Alloy Welding: Does the Thermal Cycle Influence the Microstructure?

Applied Sciences

Álvaro Presno Vélez¹  Ledennis Suárez Torres²  Isnel Rodríguez-Gonzalez²  Tomás Fernández-Columbié²  Antonio Bernardo Sánchez³  Laura Álvarez de Prado³  Marta Menéndez Fernández³ 

[1] Department of Mathematics, University of Oviedo, 33007 Oviedo, Spain;Department of Mechanics, Moa University, Moa, 83330 Holguin, Cuba;Department of Mining Technology, Topography and Structures, University of León, 24071 León, Spain;

关键词: tantalum welding;    microstructure;    heat-affected zone;   

DOI  :  10.3390/app12031440

来源: DOAJ

【 摘 要 】

The aim of the present work is to verify the microstructural behavior of a B 521 tantalum alloy UNS Grade R05200 after welding, in relation to the welding thermal cycle. The joint design was a 1.5 mm thickness circumferential butt welding, on a 32 mm outside diameter pipe, welded in 1 G position (horizontal, flat, and rotating). The chosen welding process was gas tungsten arc welding (GTAW). The microstructural analysis showed the presence of coarse, dendritic-columnar structures, as well as a hexagonal cell, with no cracks noted. Hardness tests showed an increase in hardness, from 120 HV to 425 HV, in the heat-affected zone. Through finite element methods, the behavior of the temperature field was estimated and compared.

【 授权许可】

Unknown