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Dear friends, Why for A356 cast alloy, to T8 temper treating, after solution treatment and before artificial aging, it is hold for 24 hours in room temp. to be aged naturally? I found it is for stabilizing the material, but I need to know what "stabilizing" means? Thanks all in adv.

I would be appreciated if I receive some tips about grain refiners (Al-Ti-B) and Strontium addition into A356 alloy?

swall I just mean in which cases the riser should be nearer to sprue. Gravity effects are pretty obvious.

swall, Could you please explain a little more detailed.

I have heard the risers should be placed on the sprue side of the mold cavity. Is this matter related to appropriate temperature gradient creation? Thanks to all.

Dear etch & swall, Both, Thanks a lot. Operator mistake was caused this problem. Is it possible I refer you for next probable probleme?

I used Sr-treating for modification of A356 Al alloy . But after tensil test, I got abnormally low ductilities %Elongation) I blame the Strontium quality. Could you please let me know your opinions at this regard? as well, your comments about storing standard reference for strontium and some...

I need some description about influence of Sr addition to Al-Si alloys (Hyper, Eutectic,Hypo) on volume fraction of alpha phase. Why there is alpha phase in hypereutectic alloy microstructure? please give me some quantify idea about alpha volume fraction in these alloys. Thanks a lot.

dear unclesyd, I have already known about these references that you gave but I don't believe those. You mean that you got back on your prior opinion?

dear unclesyd, thank you. please let me know detailed result of your survey. Bon Courage.

dear metengr, thanks a lot. Could you gove me a reference about your opinion as well as some data about the resulted mechanical properties?

dear unclesyd, thank you again. Finally, what's your opinion about 204 C/18 minutes?

dear swall, i think 18 min. is not industrially practical and 149 C/10 HR IS BETTER.

Hi SWALL, Could you tell me more about your opinion?

dear unclesyd, thank you for reply. these conditions, will be led to those mechanical prperties?

I think this holding time would be too short and it will not practically lead to enough hardening!

According to fig.11.25 of Metals Handbook,vol2 9th ed., 18 minutes in 204 C can lead to Min. Y.P. and Min. Ductility equal to 345 MPa and 13%,respectively. I don't believe that and I think this results may be affected by many other parameters. What's your opinions?

What's optimum aging procedure for aa6082 and mechanical properties which will acheive?

How can one recognize existing condition between following conditions: * as-cast aluminum billet * as-extruded aluminum billet * as-forged aluminum billet Please describe about apparent signs.

Dear TVP, COULD YOU PLEASE,GIVE ME SOME INFORMATION,REGARDING TO AS-FORGED & AS-EXTRUDED PROPERTIES OF 6082 WROUGHT AL ALLOYS,AS WELL AS ABOUT ITS MICROSTRUCTURE ?THANKS IN ADV.