Day 8 Outside Work: Working Metals Flashcards
What is a critical consideration when bending magnesium alloys?
The radius of bend must be at least 7 times the thickness of the sheet for soft material.
What temperature range should be used for hot shearing annealed magnesium sheet?
Up to 600°F
Why is it important to apply a finish between mating surfaces of CRES and magnesium or aluminum?
To prevent galvanic corrosion from occurring.
What is a disadvantage of hot working magnesium?
It is expensive and troublesome due to the need for heating equipment.
Why is it important to use cutting fluids when machining metals?
To reduce friction and transfer heat away from the tool and metal.
Which of the following is not a recommended method for forming titanium?
Using regular hand-operated box and pan brakes.
What type of rivets should be used when riveting magnesium alloy parts?
Type B rivets (5056-F aluminum alloy)
Which of the following is an incorrect statement regarding the handling of magnesium particles?
Water can be used to extinguish fires involving magnesium.
What is the recommended stress relief process for cold-formed titanium parts?
Heat the part to temperatures between 1,250°F and 1,450°F.
What is the consequence of setting too much clearance when punching stainless steel?
The metal becomes work-hardened and strains the machine.
What specific type of fire extinguishing agent should not be used on magnesium fires?
Carbon dioxide
Why should titanium and its alloys be isolated from magnesium and aluminum during construction?
To prevent galvanic corrosion or oxidation.
Why should magnesium alloy sheets not be cut with conventional shears?
They produce a rough, cracked edge.
Compared to other structural metals, what is the most notable characteristic of magnesium?
It is the lightest structural metal.
Which drilling practice is recommended when working with Inconel® alloys to prevent damage to the drill bit and the metal?
Push hard on the drill but maintain a constant chip rate.
