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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  1358
what is the cause of attenuation due to powerloss    1  1001
What are the superalloys used for?    2  1201
What are the superalloys?    3  2721
Why is non-destructive testing necessary?    9  2572
What kinds of NDT methods are available?    9  4156
What kind of components are fabricated from the superalloys, and what are their roles?    2  812
Why are the superalloys used for land-based turbines?    1  761
What kind of shell systems are used for investment casting?    2  871
What is investment casting?    3  1093
Is it possible to design heat treatment processes such that a gradient in grain size is produced?    4  824
How can Residual stresses in superalloy components can be minimised?    1  978
The processes used to fabricate the superalloys seem fairly mature. Is much process development going on?    2  658
What is Vacuum Induction Melting ?    3  1040
Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron?    0  320
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Un-Answered Questions
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IS:1239 same code for MS ERW and Seamless pipes ? 296
For the same part, it is possible to Specify the two different type of Hardness with same scall(EX-Quenching and tempering==>450 to 500HV30 & Hardening and Austempering 330- 380HV30) 289
Witch type curome oxide in ms matle? 52
dear sir i need some information about prevent eutectic carbide network(as cast) formation in 12% cr steel casting by another alloying element(my analays: c=1.2-1.4 cr=11-13 mo=0.2-0.4 ni=0.2-0.4 )or break network carbid after formation in solidification by heat tretment please help me my email adress: 445
where do i get previous question papers of metallurgy? 390
Why are the superalloys sometimes subjected to secondary melting processes? 393
What happens to the microstructure during service exposure? 423
What are the componentsof SCS14 ? 806
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. 505
white rust formation over zinc plated and passivated fasteners during CED coating. WHY? 685
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? 1332
how can i prevent the backfire occurrence in copper shaft furnaces? 287
Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron? 320
what are different grades of mild steel available for making machine structure (housing) 757
What is chemical composition and mechanical properties of IS 2004,Gr-3 and IS 305 AB-2? 1573
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