The solution for problem 2PC in chapter 18 of the book \"Introducion to Manufact
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Question
The solution for problem 2PC in chapter 18 of the book "Introducion to Manufacturing Processes (3rd Edition)" by John A. Schey is missing. I would like a solution to that problem. Here is the ISBN for that problem:
0-07-031136-6
Here is an image of the problem:
Thank you.
obtainable with this alloy must be maintained in the entire part. (a) Check (in Table 8-2 or, preferably, in reference works such as Metals Handbook) what metallurgical condition will give the highest strength. (b) Determine whether two parts made of material in this condition could be welded without much loss of properties. (c) If a joining process can be found, specify the best suitable filler, if used, and (e) describe what postwelding treatment, if any, is neededExplanation / Answer
A)Al alloy given as Al 6061 alloy it consist of many alloying elements namely magnesium for improving the strain hardening. Cu increase the strength and reduce ductility. Cr 0.04-0.35% improves toughness etc.
B)Al 6061 alloy having good weldability and brazability.
Hence it can be welded without much loss of properties.
C)The best joining process is MIG (metal inert gas) welding) with consumable copper electrode.
While welding Direct Current Reverse Polarity (DCRP)
can be used.
During welding Argon and Helium inert gas medium should be used.
During reverse polarity the aluminium oxide (Al203) form during welding is removed.
D)Requirement of flux material is depend on how much thickness of weld material.
IIf thickness is more than 5mm then flux material can be used.
Flux material should have same composition as base material.
E)For post welding the layer of oxides on surface should be clean and remove the slag if any.