Cold working plastic deformation of a metal or alloy

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: se. cold working Plastic deformation of a metal or alloy Nernst equation An equat martensite start temperature Ms In iron-carbon two affer materials in which a rps 01-20-98 rps MP electrochemical cell potentia at Properties 578 Part IIIa temperature where dislocations are created faster martensites, the temperature at which the transformation sandwiched between the reactants and products. than they are annihilated. of austenite to martensite is just beginning. For other temperature is14.1 INTRODUCTION raised network former An eleme component Ms chemical substance (element or systems, A is the temperature at which the parent phase tal but not high enough to In the last few chapters we learned that some properties of materials are directly related forming at least three bonds is just beginning to transform to the product phase. compound) used to specify the composition of an alloy. . to one another. Examples include: (1) the link among elastic modulus, bond strength, and (trifunctionality) or an ion th thermal expansion coefficient (all characteristics of the bond-energy curve); (2) the martensitic transformation combining ossary composites Materials formed by A shearlike two or materials that are unable rules. They are good glass fo inverse relationship between strength and ductility (or toughness) within a class of mateno change in composition when more transformation with electrical and material, called the the but instead fracture rials; and basic proportionality ofwhich one thermal conductivity in metals (the (3) the materials in network modifier An ion parent law). Often these correlated properties sheets, or Wiedemann-Franzphase, transforms into of fibers,cause problems for design reinforcing phase is in the form the product phase. ted to external loads. For forming three or more bonds engineers. In particular, the inverse relationship between strength and toughness is unforreinforcing phase inThe material used a called the that fill f a crystal that generally matrix phase particles embedded The component in incomposite to another material, a composite dow is brittle, while the tunate, since in many applications one would like to maximize both properties. When no in the context of an oxide gla is usually strongbetween besatisfy other reinforcement with for sition from the matrix the single conventional material is ablefibers or the competing design specificationsthe a matrix. space and can to present in the form of parMore precisely, brittle disrupt three-dimensional ne ticles, fibers, sheets, or whiskers. them together and to provide rystal structure. given application, onepurpose of be a composite material. primary solution may bonding train. compression moldingof two materials in whichwhich amaterials, called the A process by one of the raw glass formers. Composites are combinations them with lateral relative permeability strength. ratio of the permeability rdening or strengthening The reinforcing phase, is in the by heating sheets,squeezingand is embedded in the material is shaped form rof fibers, and or particles into the awn around a dislocation noncrystalline Amorphous a fine, uniformly of material, called t...
View Full Document

This note was uploaded on 02/25/2013 for the course PHYS 2202 taught by Professor Sowell during the Spring '10 term at Georgia Tech.

Ask a homework question - tutors are online