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Questions related from Mahdi Samii Zafarghandi
is it necessity to homogenize cast ingot of wrought superalloys (such as Hastelloy X, haynes 25 etc.)? if hot forging or hot rolling were done without homogenizing heat treatment what is happen?
30 August 2021 3,875 6 View
what is best way to producing of wire rod 10 mm or less of superalloys such as Alloy 718 (Inconel 718) to reach optimum mechanical properties? casting in VIM (Vacuum induction melting) is probably...
17 January 2021 4,555 3 View
because of Designing of VAR furnace, operator have problem to detected arc position and arc gap during the melting process. in some cases using of special video camera is mentioned but there is no...
03 October 2020 8,438 1 View
I can not find literature with comprehensive description about break downing of as-cast of CP Titanium after Vacuum Arc Remelting (VAR) process. what is best rout for hot rolling of CP titanium...
12 July 2020 9,501 2 View
after production of Ti-0.2 Pd ingot by VAR (Vacuum Arc Remelting) process, ingot should be roll in high temperature to gain strength. what is best temperature limit for initial rough working and...
08 June 2020 2,628 0 View
Ti Gr.7 (Ti-0.2Pd) is most corrosion res. grade of Ti alloys. for manufacturing of round bar we want compressing of sponge Ti by Pd, but weight of Pd is modest (about 60 gr in 30 Kg of round bar)....
21 February 2020 2,743 3 View
we want reducing Carbon content of initial electrode of VAR furnace, electrode composition prepared for VAR is (FSX-414: 52Co 29Cr 10Ni 7W) but Carbon is higher than limited composition (about...
20 December 2019 8,966 3 View
what is practical way to modify carbon content in FSX-414 (cast superalloy)? standard composition is (52Co- 29Cr- 10Ni- 7W- 0.25C) but we received scrap by 0.5% C, it should probably remelting in...
14 December 2019 4,806 3 View
how can determine start-up, steady state and hot-topping stage in VAR process? and what way does reducing hot-topping ( forming convex shape in top of ingot) stage for Ti-64 melting?
11 December 2019 8,174 0 View
i work on Cobalt base alloy (Haynes 188 Co-Cr-Ni-W), we reduced initial bulk thickness into 60% and 85% (or strain). then we conducted tension test in environment temperature, it was interesting,...
06 September 2016 4,719 12 View
i should be achieve EBSD (electron back scatter diffraction) for my current project. but we had not access to it. can i send my specimens to a corporation or institute to do it for me. please guide me
29 May 2016 3,790 4 View
we annealing Haynes 188 (Co-base alloy) in different temperature and after we observed some twining in it (annealing twin). i want comparison whit together, i estimate volume fraction of twin...
28 April 2016 4,244 2 View
Hello, I need some special new information (2000-2016) about hot working and its effect on microstructure and mechanical properties of Haynes 188, and also heat treatment diagram like...
09 April 2016 3,058 2 View
i need information about thermomechanical processes (hot roll, hot tension or hot torsion) of haynes 188 or haynes 25 (L 605) cobalt based alloys that investigated microstructure through...
22 February 2016 9,890 2 View
in this pic you see microstructure of Haynes 188 after produced of it ingot (homogenize in 1200C then water quench). incidentally this pic is for before of it rolling process.what is carbide type...
05 February 2016 2,685 3 View
i think homogenize of it should be 2 or more steps after product it ingot. i can't find homogenize temperature and cycle of haynes 188 in literature.
01 February 2016 4,626 5 View
Hi everyone, we conducted hot tensile test for evaluation of hot workability of Ha 188 (superalloy). i want know, how can calculated onset of recrystallization and also overcome it DRX (peak...
01 January 1970 1,373 3 View
we manufactured sanitary valves with melting brass in crucible furnace, we want have lowest heat wasting, what is your comment?
01 January 1970 6,640 3 View
Brass (60Cu-40Zn) often melted by crucible furnace (as schematic picture attached). But melting process has low efficiency, fuel and heat were wasted considerably. I suggested use two ventilator...
01 January 1970 8,479 5 View
