Metallurgy Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Metallurgy Interview Questions

Questions Answers Views Company eMail

What kind of shell systems are used for investment casting?

2 4754

Why are the superalloys used for land-based turbines?

1 3924

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

2 4278

What kinds of NDT methods are available?

10 17926

Why is non-destructive testing necessary?

9 16872

What are the superalloys?

3 8993

What are the superalloys used for?

2 5763

what is the cause of attenuation due to powerloss

1 4610

what happens when a EM wave is transmitted

1 4876

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

1 4325

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

3 6109

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

IOCL,

2967

what are the ores of copper?

4 7196

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,

2388

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

Novellus,

2271

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Un-Answered Questions { Metallurgy }

Is it possible to determine the heat treatment condition in stainless steel (astm a 479 gr xm-19) by checking the microstructure?

924

What is the material of E185

1674

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

965

What is select miller cutter?

1102

Define what are ceramics?

1219

what medal conducts heat best?

1005

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

998

Explain metallurgical microscopes?

964

Define what is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbine blades etc. When both are used in the lost-wax method?

952

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

1149

State some precautions to be taken in case of powder metallurgy?

915

Define what is the melting point of e70 steel, 304,308,316 stainless steels? In addition, define what is the hottest part of the flame in a fire?

1061

Aircraft gasturbine is made of ?

1006

What are the effects of recrystallization of metals on alloying?

915

What is tack welding ?

1098

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