Nitrogen Content and Porosity of Titanium Weld Metal

TLDR: In this paper, the effects of the nitrogen partial pressures in the welding atmospheres of several gas mixtures and welding conditions on the nitrogen content and porosity of titanium weld metals were systematically studied.

Abstract: Effects of the nitrogen partial pressures in the welding atmospheres of several gas mixtures and welding conditions on the nitrogen content and porosity of titanium weld metals were systematically studied.The important conclusions obtained are as follows;1. Titanium weld metals absorb large amounts of nitrogen in arc welding in atmospheres with rich nitrogen.2. The nitrogen content of titanium weld metals decrease with an increasing welding current as in other metals.3. The existence of an oxidizing gas in arc atmospheres does not contribute to the enhancement of nitrogen absorption into titanium weld metals.4. Nitrogen absorbed causes porosity of welds.