I need help with B and C. I don\'t know what is meant by primary and eutectic ph

Question

I need help with B and C. I don't know what is meant by primary and eutectic phase. C is confusing as well. Please provide an explanation for your steps...

Winter 2018 Midterm Review islocations and Stre on the same stress-strain graph (plot stress on y-axis and strain on x-axis) the curves you you expect resolved shear str are) most favo Superimpose for aluminum (Al) and aluminum oxide (Al20s) ese m(s) is Al-0s phase diagram is shown below (ss denotes a solid solution). Show all work and as tel of some hypothetic The Mgo- C crystal structure a tensile stress iseasoning is correct, you will receive full credit. Fill in for each box the phase(s) that are present If slip occurs on a (10 tion, compute the stre s if its critical resolve b) At a temperature slightly below 2000°C, list two different compositions at which the mass fraction of the "primary phase" is 0.60 and the "eutectic phase" is 0.40 c) For a system containing originally 40g pure Al20s and 60g pure MgO that was hypothetically melted and slowly cooled to a temperature right below 2000 C, what is the mass (in grams) of Al2Os in the rystal structure and i stress is applied a primary phase, in the eutectic MgO (ss) and in the eutectic MgAl204 (ss)? Composition (mol% Al2O3) ss solid solution 200 20 60 80 ar stress for Determine the maxi- 5000 Liquid 4500 2400H t 4400 between deforma tion by slip relativeCoe 4000 MgO 2000 - (ss) 3500 MgAl204 grain bounda C 585 ering with the sli gle 3000 MgO (ss) CoO m are pialy40AlL0(A) 16o0 MgAl204 (ss) 609 10(5) 2500 you 1200 tooT 2000 20 40 60 80 100 (MgO) Composition (wt% Al2O3) (Al2O3) f o.010, and theIm A metal has a toughness of 748 MJ/m (or 748 MPa). Elastic deformation terminates at a strain o material fractures at a total strain of 0.55. The modulus of resilience is 2.50 MJ/m3 (2.50 MPa). Plastic to the bedthe equation -kn, where n is 0 18, and assume for this metal the equation is valid n determining the answer. (With p se se mm is 230 point off at

Explanation / Answer

Primary phase is the phase in which solid phase form on cooling the liquid,this is also known as beta phase.

2. eutectic phase is the phase in which three phases reaction will take place. For example liquid alloy become solid at specific temperature

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