Publication: Mechanical Strength and Analysis of Fracture of Titanium Joining Submitted to Laser and Tig Welding
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Date
2012-11-01
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
Universidade Federal de São Carlos (UFSCar), Dept Engenharia Materials
Type
Article
Access right
Acesso aberto
Abstract
This study compared the tensile strength and fracture mechanism of tungsten inert gas (TIG) welds in cylindrical rods of commercially pure titanium (cp Ti) with those of laser welds and intact samples. Thirty dumbbell-shaped samples were developed by using brass rods as patterns. The samples were invested in casings, subjected to thermal cycles, and positioned in a plasma arc welding machine under argon atmosphere and vacuum, and titanium was injected under vacuum/pressure. The samples were X-rayed to detect possible welding flaws and randomly assigned to three groups to test the tensile strength and the fracture mechanism: intact, laser welding, and TIG welding. The tensile test results were investigated using ANOVA, which indicated that the samples were statistically similar. The fracture analysis showed that the cpTi samples subjected to laser welding exhibited brittle fracture and those subjected to TIG welding exhibited mixed brittle/ductile fracture with a predominance of ductile fracture with the presence of microcavities and cleavage areas. Intact samples presented the characteristic straightening in the fracture areas, indicating the ductility of the material.
Description
Language
English
Citation
Materials Research-ibero-american Journal of Materials. São Carlos: Universidade Federal de São Carlos (UFSCar), Dept Engenharia Materials, v. 15, n. 6, p. 937-943, 2012.
