Open AccessEffects of Conventional Welding and Laser Welding on the Tensile Strength, Ultimate Tensile Strength and Surface Characteristics of Two Cobalt–Chromium Alloys: A Comparative Study
Author(s) -
Madhan Kumar Seenivasan,
Jayesh Raghavendra Sethumadhava,
Vaidyanathan Anand Kumar,
Grover Manita
Publication year - 2012
Publication title -
the journal of indian prosthodontic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 20
eISSN - 1998-4057
pISSN - 0972-4052
DOI - 10.1007/s13191-012-0118-9
Subject(s) - ultimate tensile strength , materials science , welding , laser beam welding , scanning electron microscope , composite material , alloy , metallurgy , tensile testing , heat affected zone
The purpose of this study was to evaluate the efficacy of laser welding and conventional welding on the tensile strength and ultimate tensile strength of the cobalt-chromium alloy. Samples were prepared with two commercially available cobalt-chromium alloys (Wironium plus and Diadur alloy). The samples were sectioned and the broken fragments were joined using Conventional and Laser welding techniques. The welded joints were subjected to tensile and ultimate tensile strength testing; and scanning electron microscope to evaluate the surface characteristics at the welded site. Both on laser welding as well as on conventional welding technique, Diadur alloy samples showed lesser values when tested for tensile and ultimate tensile strength when compared to Wironium alloy samples. Under the scanning electron microscope, the laser welded joints show uniform welding and continuous molt pool all over the surface with less porosity than the conventionally welded joints. Laser welding is an advantageous method of connecting or repairing cast metal prosthetic frameworks.