Un-Answered Questions { Metallurgy }

What happens to the microstructure during service exposure?

1243


Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron?

931


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

1757


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.

1308


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

1194





i want to go to US for Bachlore of computer science, I didn't appeared for SAT. my ielts scores are too low only 5.5 band and I am confused if VISA OFFICERS will ask why u hadn't given SAT. what i have to answer pl suggest?

1088


what is No.1 Laathing Scrap Bundle ( Mill Scrap )

1103


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: alloymail@gmail.com

1278


Any body know when the medicals are starting for the BSI P.O , if anybody got any call letter please let me know

999


what are different grades of mild steel available for making machine structure (housing)

1829





does any one has gate solutions of 2007,08,09 metallurgical engg papers?

1460


What is chemical composition and mechanical properties of IS 2004,Gr-3 and IS 305 AB-2?

5033


what are the causes of scaling in cast iron, after subjecting it to annealing process.

1330


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)

1301


what should be the exact suction capacity for 3 to 5 mt capacity lead rotary furnace and length of duct line for proper suction for same

1122