IMSE Exam 1 Study Guide

IMSE Exam 1 Study Guide Manufacturing in the US will all be moved to other countries. - False The US accounts for about ____ of global manufacturing in 2014. - 17% What two things are both iron-carbon alloys? - steels and cast irons What do both brass and bronze contain? - copper What type of structure do most atoms have? - crystalline Which structure has better ductility? - face-centered Metals have (higher/lower) thermal conductivity than plastics. - higher On Boeing 787 airplanes, which type of material is used the most? - composites What materials are used to mint the 25 cent coins now? - copper and nickel 4 types of engineering materials. - metals, plastics, ceramics, and composites. What are ferrous metals? - iron-based metals examples of ferrous metals - iron and steel examples of non-ferrous metals - copper, aluminum, magnesium, zinc, and titanium Which structure has better strength? - body-centered Unit of stress. - 1 PSI = 6895 Pa Unit of strain. - no unit Deformation - a change in shape or size of an object due to applied force Elastic Deformation - Once forces are no longer being applied, the object returns to original shape Plastic Deformation - Once forces are no longer being applied, the object maintains a new shape. Physical properties definition - distinguishing one material from another Physical properties - density, melting point, optical, thermal, electrical, and magnetic Mechanical properties definition - how a material responds to applied loads of forces Ca young's modulus be greatly changed by manufacturing processes? - no Can the yield strength of a material be greatly changed by manufacturing processes? - yes Can the ductility of a material be greatly changed by manufacturing processes? - yes Why is it hard to bend the paperclip back to shape? - yield strength increased by strain hardening As tensile strength increases, material's ductility ___. - decreases High ductility metal. - aluminum Low ductility metal - titanium What is elastic modulus on the stress strain curve? - slope of the straight line at the beginning of the test What is yield stress on the stress strain curve? -