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 Categories >> Engineering >> Metallurgy
 
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Question Asked @ Answers Views     Select
what happens when a EM wave is transmitted    1  1366
what is the cause of attenuation due to powerloss    1  1005
What are the superalloys used for?    2  1214
What are the superalloys?    3  2740
Why is non-destructive testing necessary?    9  2616
What kinds of NDT methods are available?    9  4202
What kind of components are fabricated from the superalloys, and what are their roles?    2  815
Why are the superalloys used for land-based turbines?    1  764
What kind of shell systems are used for investment casting?    2  880
What is investment casting?    3  1100
Is it possible to design heat treatment processes such that a gradient in grain size is produced?    4  837
How can Residual stresses in superalloy components can be minimised?    1  985
The processes used to fabricate the superalloys seem fairly mature. Is much process development going on?    2  664
What is Vacuum Induction Melting ?    3  1046
Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron?    0  325
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Un-Answered Questions
 
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Why are the superalloys sometimes subjected to secondary melting processes? 397
what is a rate controlling step ? how is it dependent on reaction path ? explain with an example. 437
where do i get previous question papers of metallurgy? 394
does any one has gate solutions of 2007,08,09 metallurgical engg papers? 693
sir please send me previous question papers on metallurgy at vishal.nitrr07@gmail.com .....thank you 297
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. 510
any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material. 381
1)We are using OHNS material for manufacturing Thread & plain Gauges.What is the excat composition of OHNS for Gauges? 2)Which is the reference standard book for OHNS Material composition for Gauges? 1349
white rust formation over zinc plated and passivated fasteners during CED coating. WHY? 710
What is the difference between DI pipes, Cast Iron pipes, LA Pipes, SW pipes, SWR Pipes, RCC hume pipe, RCC spun pipe ? What are their IS codes and applications ? 424
How to melt the solidified copper accretions in copper scrap melting furnace? 203
What is chemical composition and mechanical properties of IS 2004,Gr-3 and IS 305 AB-2? 1590
what are the causes of scaling in cast iron, after subjecting it to annealing process. 461
WHAT IS THE ACTUAL DEFINATION OF PLANET? 445
Any body know when the medicals are starting for the BSI P.O , if anybody got any call letter please let me know 293
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