A preparation method of in-situ mgo dispersion strengthened ultrafine-grained al-mg alloy
A technology of dispersion strengthening and in-situ generation, which is applied in the field of powder metallurgy, can solve the problems of low material strength and elastic modulus, easy agglomeration of second phase particles, etc., and achieve simple equipment, easy realization of parameters, and high elastic modulus. Effect
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[0030] A method for preparing an in-situ MgO dispersion-strengthened ultrafine-grained Al-Mg alloy, comprising the steps of:
[0031] a. Weigh Al powder and Mg powder with a precision balance, wherein the atomic proportions of solute Mg atoms in the alloy are 0at.%, 2.5at.%, 5at.%, 7.5at.% respectively; select 1wt.% stearin Acid as a process control agent to prevent and avoid excessive cold welding of powder;
[0032] b. Put the weighed Al powder and Mg powder into the ball mill jar equipped with stainless steel grinding balls respectively, and the stainless steel grinding balls are 5 steel balls with a diameter of 20mm and 10 steel balls with a diameter of 16mm; wherein, the Al powder and the Mg powder The ratio of the total mass of the powder to the total mass of the stainless steel grinding balls is 5:1;
[0033] c. In a glove box full of argon, seal the ball mill tank with stainless steel balls and powder;
[0034] d. First use a planetary ball mill to fully mix the powd...
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