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Lecture 8 - ENGR 4250 Advanced Materials Engineering...

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ENGR 4250 – Advanced Materials Engineering Lecture 8 Testing of Materials Metallic Alloys Dr. A. Keshavarz - ENGR 4250U
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ex: hardness vs structure of steel Properties depend on structure Data obtained from Figs. 10.30(a) and 10.32 with 4 wt% C composition, and from Fig. 11.14 and associated discussion, Callister 7e . Micrographs adapted from (a) Fig. 10.19; (b) Fig. 9.30;(c) Fig. 10.33; and (d) Fig. 10.21, Callister 7e . ex: structure vs cooling rate of steel Processing can change structure Structure, Processing, & Properties Hardness (BHN) Cooling Rate (ºC/s) 100 200 300 400 500 600 0.01 0.1 1 10 100 1000 (d) 30 µ m (c) 4 µ m (b) 30 µ m (a) 30 µ m Dr. A. Keshavarz - ENGR 4250U
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