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Questions related from Mahdi Samii Zafarghandi
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...
12 December 2019 7,489 3 View
we want to produce VAR electrode (d=150 mm) from scraps (Ti 6-4) for melting (with attached shape). what is best solution for producing of initial electrode? can we cut it to small pieces and...
11 November 2019 9,455 2 View
who can help me about "Incoloy 907" its (Fe-Ni-Co-Nb-Ti) superalloy. i need some information about: product approach, deformation, heat treatment and microstructrue. please guide me.
07 July 2017 9,883 6 View
hello after hot rolling with 2 different reduction of thickness (60% and 85%) on haynes 188 (Carbide strengthened and solid solution Cobalt base alloy) we observed sample with 85% reduction of...
05 May 2017 1,583 6 View
hi everyone, we conducted hot tension test on Haynes 188 (Co base superalloy) at 1100 C, 1150 C, 1175 C and 1200 C. but magnitude of ductility decrease after 1150 C. we evaluate microstructure...
01 January 2017 2,378 7 View
who can help me for microetchant of Haynes 188 (Co-22Ni-22Cr-14W-3Fe-0.1C)? please guide me with detail...Thank you.
06 June 2016 1,181 0 View
what is the best etchant for Haynes 188 (Cobalt base)? i used: 1)HCl 37% + H2O2 2)solution A: 7ml HCl+15ml H2SO4+15ml HF+ 15ml HNO3 + 10ml H2O solution B: 20ml of solution A + 10ml HF+ 20ml HCl+...
05 May 2016 5,382 1 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
05 May 2016 3,231 5 View
look at pic. what is this precipitation and streaks? this alloy was elcroetched. 100ml water 10 ml HCl
05 May 2016 7,251 6 View
what is best etchant for revealing microstructure of Haynes 188 (Co-base alloy)? i used below solution but result wasn't good enough. i used: 90ml HCl 37%+ 5ml H2O2 please help me. thank you all
05 May 2016 2,008 3 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...
04 April 2016 7,974 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.
02 February 2016 7,472 6 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...
02 February 2016 5,735 4 View
look at pic attached. i used (solution A: 7ml HCl, 10ml H2SO4, 10ml HF,10ml HNO3, 10ml H2O. solution B: 20ml solution A, 20ml HCl, 10ml HF and 0.5gr CuCl2.2H2O) time etching: 5min solution A then...
02 February 2016 5,149 3 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...
02 February 2016 5,930 2 View
who can give me informations about thermomechanical process (hot work, hot roll,...) of cobalt base alloys (haynes 188 or haynes 25) and microstructure of them??
02 February 2016 5,194 0 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 6,139 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 2,729 3 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,...
01 January 1970 1,742 15 View
