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Metallurgy Interview Questions
Questions Answers Views Company eMail

What kind of shell systems are used for investment casting?

 2 2809

Why are the superalloys used for land-based turbines?

 1 2515

What kind of components are fabricated from the superalloys, and what are their roles?

 2 2677

What kinds of NDT methods are available?

 10 12459

Why is non-destructive testing necessary?

 9 11861

What are the superalloys?

 3 6560

What are the superalloys used for?

 2 3839

what is the cause of attenuation due to powerloss

 1 3219

what happens when a EM wave is transmitted

 1 3389

Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062

 1 2727

What metal would be better suited for heat transfer, reliability, and cost...??? I'm currently using Aluminum for a 'hot-wedge'.

 3 4044

i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect

IOCL,

2004

what are the ores of copper?

 4 4380

I currently use 17-7 PH stainless which is hardened to condition CH after forming. raw matl is .1.75"X .12" X .008". Its main usage after hardening is silicon wafer retainer where it's contantly cycled up and down to putin and remove wafer after 40-60 sec process at 400C temp. At this high temperature this part seemed to deform after a a couple of hundred wafer which is what it was designed for in the first place. THere is a proposal to go to a different material to increase lifeline of this part. My question is..... can 321 SST be a plugin replacement. I know this has a higher temp rating but how about its forming characteristics, will it have spring properties, and wont become brittle after prolonged exposure to 400C.

Novellus,

1518

any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material.

Novellus,

1400

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Un-Answered Questions { Metallurgy }

Explain vacuum induction melting?

139

What is the Difference of ultimate tensile stress of mild steel to ultimate compressive stress ?

169

How does iron and steel exhibit allotropy?

127

What is carbon steel ?

169

What is the major difference between quenching and annealing?

144




what is the chemical composition of ceramic and define what is its atomic density?

147

What is the chemical composition of ceramics?

143

Define what is the difference between diagrams of it and ct in heat treatment of steels?

165

What is a gray surface?

190

Differentiate between ferrite percentage and ferrite number?

154

is nickel considered a non-sparking metal?

147

What is the function of washer?

176

Will aluminum alloy like 380 or 356 settle? Meaning while in “liquid form” above melting point will the heavier elements like copper, fe, silicon, zinc etc. Settle to the bottom of the liquid/molten aluminum after a period.

164

What are the characteristics of the thermodynamic stage of a metal?

165

What is spcc material?

144

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