MECT 3155 Lecture Notes - Lecture 1: Brittleness, Shear Modulus, Brinell Scale
6 Dec 2016
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Document Summary
Skewness when a frequency distribution departs from a theoretical normal shape, it is said to be skewed or non-symmetrical. Used on smaller specimen and harder materials: stress-strain curve for ductile material and explain it. Ultrasonic testing defection conformities are found by comparing the sonic properties of a sample w/ the properties of a sample that is known to be good w/ out destroying the sample. Coupling agent it converts the electrical impulses of the instrument into high frequency sound energy. Mix dry ice and methyl alcohol in a beaker. Place select samples in a mixture to cool. When ready w cool/hot samples of metal on charpy impact tester to test. Using handheld pyrometer monitors temperature of sample on the tester and release the pendulum at the desire temperature. Ductility when a solid material stretches under tensile stress. Brittleness when subjected to stress, it breaks w/ out significant deformation (strain). Brittle material absorbs relatively little energy prior to fracture.
