Question: please solve i) Explain what microstructure and crystal structure are. (5) Pure iron goes through a polymorphic phase change from BCC to FCC upon heating

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i) Explain what microstructure and crystal structure are. (5) Pure iron goes through a polymorphic phase change from BCC to FCC upon heating through 912C. At 912C, the BCC structure has a lattice constant of a=0.293nm and the FCC structure has a lattice constant of a=0.363nm. ii) Calculate the planar density of BCC iron in the following planes: (7) a. (100) b. (110) c. (111) iii) Calculate the linear density of FCC iron in the following directions: (8) a. [100] b. [110] c. [111] i) Explain what microstructure and crystal structure are. (5) Pure iron goes through a polymorphic phase change from BCC to FCC upon heating through 912C. At 912C, the BCC structure has a lattice constant of a=0.293nm and the FCC structure has a lattice constant of a=0.363nm. ii) Calculate the planar density of BCC iron in the following planes: (7) a. (100) b. (110) c. (111) iii) Calculate the linear density of FCC iron in the following directions: (8) a. [100] b. [110] c. [111]

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