High-Frequency, Pulsed-Current GTA Welding

Format:

Conference/Event

Author/Creator:

Roden, William A., author.

Conference Name:

National Aerospace Engineering and Manufacturing Meeting (1972-10-02 : San Diego, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1972

Summary:

Investigations were made of the effects of high-frequency, d-c, straight polarity current pulsations in the range of 2,000-25,000 pulses/s on the quality and mechanical properties of gas tungsten arc (GTA) welds in 2219 aluminum.Pulsed-current and conventional GTA welds were made on 0.125, 0.250, and 0.350 in 2219 aluminum, using free fall, single-pass butt welds. Results of this investigation show that pulsed-current welds are superior in x-ray integrity to conventional GTA welds made under similar conditions, with discontinuity levels 80% lower for relatively long weldments. High-frequency pulsation is also very effective in avoiding the typical cast structure of weld metal. Such welds exhibit fracture toughness values 10-15% higher than conventional GTA weldments.Potential manufacturing advantages include higher weld quality (fewer rejects and lower rework costs) and thinner weld lands, which result in lower structural weights

Notes:

Vendor supplied data

Publisher Number:

720874

Access Restriction:

Restricted for use by site license