Why do metallurgy engineers so sucessfull in their profession so that they dont think beyond their dreams?5 6976
What do you do with the super alloys in the present working culture so as to improve the technology for general people?2 3666
What is meant by powder metallurgy?4 5751
What special precautions need to be employed if a powder metallurgy route is chosen?1 3473
Why are the superalloys sometimes subjected to secondary melting processes?1 1570
When might secondary melting processes be unnecessary?2 2589
Why do the Gamma Prime and Gamma Double Prime phases play such an important role in promoting strength in the superalloys?1 5115
Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron?922
What is Vacuum Induction Melting ?3 3386
The processes used to fabricate the superalloys seem fairly mature. Is much process development going on?2 2589
How can Residual stresses in superalloy components can be minimised?1 2795
Is it possible to design heat treatment processes such that a gradient in grain size is produced?4 3334
What is investment casting?3 4230
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 ?
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: firstname.lastname@example.org
difference between sand casting and shell casting
On which basis annealing cycle of steel bars of UpTo 6 MTR can be decided.we r charging 40-45 metric ton load for annealing in bogie furnace?
what is wedge load test method . what is offset method .
What are the chemical composition of cast iron grade 20
what are different grades of mild steel available for making machine structure (housing)
What are the componentsof SCS14 ?
What is the chemical composition of FCVS350 ?
What is equivalent is 2004 cl 5
The requirement for ASTM A217 Gr. WC9 castings for valves components like Body and Bonnet were Normalising at 920+/- 20 Deg. C and Tempring 780+/- 20 Deg. C The specification calls furnace shall be calibtated within +/-14 deg. C The Heat Chart shows minimum temperature for normalising 900 to 920 Deg. C, but maximum temperature 960-990 Deg. C Tempering 780+/-20 Deg. C is within limits and accepted. Casting having integral test bars, heat trated along with castings passed in chemical znalysis and mechanical properties. Since normalising maximum temperature is not meeting specification, where castings can be salvaged or renormalised and retempered to meet specification. Whether it will have affect on remechanical properties testing
where do i get previous question papers of metallurgy?
WHAT IS THE ACTUAL DEFINATION OF PLANET?
What happens to the microstructure during service exposure?
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.