Search results
Results from the WOW.Com Content Network
Perhaps there should be some information on this. --petebachant 19:31, 17 July 2013 (UTC) []It basically isn't weldable, though a bit of work with friction-stir welding of 7075-0 is showing that there may be some promise along those lines.
The first 7075 was developed in secret by a Japanese company, Sumitomo Metal, in 1935, [3] but reverse engineered by Alcoa in 1943, after examining a captured Japanese aircraft. [4] 7075 was standardized for aerospace use in 1945. [5] 7075 was eventually used for airframe production in the Imperial Japanese Navy.
Many metals and thermoplastics can be welded, but some are easier to weld than others (see Rheological weldability). A material's weldability is used to determine the welding process and to compare the final weld quality to other materials. Weldability is often hard to define quantitatively, so most standards define it qualitatively.
Consisting of alloys that were meant to replace the popular 2024 and 7075 alloys directly, the second generation of Al–Li had high lithium content of at least 2%; this characteristic produced a large reduction in density but resulted in some negative effects, particularly in fracture toughness. The third generation is the current generation ...
Welding imperfections such as weld discontinuities. - Risk of welding in very short time. [67] Moreover research articles do not always describe the risks. Corner problem in friction welding with specific parameters time below 100 ms and conical contact surface. [67] There is a complete weld inside but corner is not welded.
Most weld purging is carried out on joints made by the TIG or GTAW arc welding process. [6] When the laser welding process is chosen, joints or welds being made on reactive materials will need to be carried out and in the case of electron beam welding, this is carried out in a vacuum, in which case purging takes place by complete evacuation of all gas.
Lead works in a similar way to sulfur. Bismuth achieves a free machining steel by melting into a thin film of liquid for a fraction of a microsecond to lubricate the cut. Other advantages to bismuth include: more uniformly distributed because of its similar density to iron; more environmentally friendly, as compared to lead; still weldable. [1]
7005 is an aluminium wrought alloy [1] used in bicycle frames. Due to its relative ease of welding, it does not require expensive heat treating.It is, however, harder to form, making manufacture more challenging. [2]