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Commercial annealing is another name for ____________

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Commercial annealing is another name for ____________

(a) Process annealing

(b) Stress relief annealing

(c) Recrystallization annealing

(d) Spheroidise annealing

I got this question by my school teacher while I was bunking the class.

My doubt is from Annealing in chapter Heat Treatment of Engineering Material & Metallurgy

1 Answer

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The correct answer is (b) Stress relief annealing

To elaborate: When internal residual stresses are not removed, distortion or warpage of the material may occur. Stress relief annealing is carried out to remove these stresses caused by castings, quenching, machining, welding etc. Stress relief annealing is otherwise also known as commercial annealing.

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