q4f02 - 7 Phase diagrams can be used to interpret the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Home Introduction Policies Resources Requirements & Grading Syllabus Assignments Handouts Discussion Web Links Distance Learners Contact MSE 200 Quiz 4
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Phase rule applied to metallic systems is different because a. Temperature has no effect b. composition has no effect c. Pressure has no effect (c ) 2. Lever rule accounts for the a. lowest free energy of all the phases b. number of atoms in the alloy to be distributed between two phases c. solubility of one set of atoms in the other ( b) 3. One of the lever lengths becomes zero when the point is a. single phase region b. on the phase boundary c. in side the two phase region (b ) 4. For precipitation hardening a sloping solvus line is a. sufficient b. necessary c. unnecessary (b ) 5. Most castings of alloys are made near a. eutectic composition b. isomorphous region c. single phase region (a ) 6. Hume-Rothery rules give the conditions for a. homogenization b. precipitation hardening c. solid solubility (c )
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 7. Phase diagrams can be used to interpret the microstructure of the castings provided they are a. cooled rapidly b. finite cooling rate c. very slowly (c ) 8. Terminal solid solutions in a two-component systems are observed when the solid solubilities of the atomic species in each other are a. large b. limited c. hundred percent (b ) 9. In a two-component system with limited solubility, alloys on either side of the euectic point have a. single melting point b. melting point that is lowest c. range of melting points (c ) 10. Liquidus line in a phase diagram of an isomorphous system is expected to remain a. below the solidus line b. above the solidus line (b ) d. horizontal to the composition line Bonus question: Directionally solidfied composites containing layered structures are possible a. in isomorphous system b. in hypoeutectic region c. close to the euetectic region (c )...
View Full Document

This note was uploaded on 10/11/2009 for the course MSE 200 taught by Professor Wholedepartment during the Spring '08 term at N.C. State.

Page1 / 2

q4f02 - 7 Phase diagrams can be used to interpret the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online