Effect of minor chemistry elements on GTA weld fusion zone characteristics of a commercial grade titanium
- Ecole Centrale Nantes (France). Lab. de Mecanique et Materiaux
Gas Tungsten Arc Welding (GTAW) is the most common technique employed in the fabrication of rolled thin tubes. One of the major manufacturing problems concerns the stability of weld fusion zone on materials from different casts, notwithstanding stringent monitoring of the process parameters -- current, voltage and travel speed. These parameters determine the theoretical weld heat and are expected to control the instantaneous mass of melt. According to the data compiled by Sahoo et al., oxygen is known to reduce the surface tension of most of the metals. However, investigations on the role of minor changes in concentrations of elements like sulphur, oxygen, selenium, bismuth, aluminium, and titanium in steels have very often attributed the cast to cast variations to different temperature gradients of surface tension over the weldpool. To the author`s knowledge, no reported work so far has revealed changing weld profiles in autogeneous mechanized GTA welds on titanium due to minor composition changes.
- OSTI ID:
- 250701
- Journal Information:
- Scripta Materialia, Vol. 34, Issue 11; Other Information: PBD: 1 Jun 1996
- Country of Publication:
- United States
- Language:
- English
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