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Metallurgy Interview Questions
Questions Answers Views Company eMail

What kind of shell systems are used for investment casting?

 2 3799

Why are the superalloys used for land-based turbines?

 1 3195

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

 2 3514

What kinds of NDT methods are available?

 10 15417

Why is non-destructive testing necessary?

 9 14601

What are the superalloys?

 3 7815

What are the superalloys used for?

 2 4861

what is the cause of attenuation due to powerloss

 1 3927

what happens when a EM wave is transmitted

 1 4139

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

 1 3595

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

 3 5141

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

IOCL,

2530

what are the ores of copper?

 4 5908

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,

1946

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

Novellus,

1864

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Un-Answered Questions { Metallurgy }

What is the composition of cast grade iron 35?

556

What is dielectric medium in EDM ?

630

What is duplex and super duplex steel?

569

What is iron ferrite, define what is it used for, and where is it found?

552

Why is chromium molybdenum steels used to build pressure vessels? Define what is special about the properties of chromium molybdenum steels that make them ideal for pressure vessels?

555




A plain carbon steel contains 45 wt% of proeutectoid ferrite. Define what is its average carbon content in weight percent? I know that you need to use a tie line in the phase diagram, but my book does not really give a good example to go by

610

difference between sand casting and shell casting

1358

Explain rupture stress

620

What is the composition of d2?

570

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

628

Explain dislocation theory?

598

Define what is special about the properties of chromium molybdenum steels that make them ideal for pressure vessels?

708

We make aluminum moulds by press casting, can u suggest any thing so that the moulds should shine after casting?

536

What is the melting point of brass?

590

Aircraft gasturbine is made of ?

604

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