Mechanical and Physical Properties Laser and GTA Welding of Commercial Pure Titanium

Subject Areas : journal of New Materials

S.GH. رضوی ¹ , M. سبکتکین ریزی ² , M. طاهری ³

1 - مدرس، دانشگاه جامع علمی کاربردی استان چهارمحال و بختیاری، ایران
2 - دانشجوی دکتری، دانشگاه آزاد اسلامی، واحد نجف آباد، دانشکده مهندسی مواد، اصفهان، ایران
3 - مدرس، دانشگاه آزاد اسلامی، واحد قزوین، دانشکده مکانیک، قزوین، ایران

Received: 2014-07-01 Accepted : 2014-07-01 Published : 2014-08-23

Keywords: mechanical properties, Ti alloys, laser welding, GTA welding,

Abstract :

Titanium alloys are widely used in many fields such as the automotive, aerospace and chemical industries. In some applications, titanium alloys are needed for use with particular welding methods. These are GTAW, GMAW and laser welding. In this study, titanium Grade- 2 (Cp-Ti) plates were welded using Laser welding and GTAW. Tensile and flexural tests were applied to the welded samples. The microstructure and SEM images of main material and welded regions were studied and micro hardness measurements were performed. Tensile and flexural strengths of laser welded samples were higher than GTA welded samples. The micro hardness values of the weld-zone of laser welded samples were lower than the GTA welded samples welding zone. In microstructure and SEM investigations, oxide structures and the splashes of molten metal appearing like drops were identified. The width of the weld- zone in laser welding was in a narrow range.