Phase Transformations in Metals and Alloys |
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Page 24
... atoms is very large then interstitial solid solutions are energetically most favourable , Fig . 1.18c . New mathemati- cal models are needed to describe these solutions . In systems where there is strong chemical bonding between the atoms ...
... atoms is very large then interstitial solid solutions are energetically most favourable , Fig . 1.18c . New mathemati- cal models are needed to describe these solutions . In systems where there is strong chemical bonding between the atoms ...
Page 61
... atoms move from ( 2 ) to ( 1 ) , μ > μ therefore B atoms move from ( 1 ) to ( 2 ) . ( f ) μ1⁄4 > therefore A atoms ... atom is given by 3 kT 61 Atomic Mechanisms of Diffusion.
... atoms move from ( 2 ) to ( 1 ) , μ > μ therefore B atoms move from ( 1 ) to ( 2 ) . ( f ) μ1⁄4 > therefore A atoms ... atom is given by 3 kT 61 Atomic Mechanisms of Diffusion.
Page 62
... atom jumping over on to the vacancy . This is illustrated in Fig . 2.2 . Note that in order for the jump to occur the shaded atoms in Fig . 2.2b must move apart to create enough space for the migrating atom to pass between . Therefore ...
... atom jumping over on to the vacancy . This is illustrated in Fig . 2.2 . Note that in order for the jump to occur the shaded atoms in Fig . 2.2b must move apart to create enough space for the migrating atom to pass between . Therefore ...
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Phase Transformations in Metals and Alloys David A. Porter,K. E. Easterling No preview available - 1992 |
Common terms and phrases
alloy atoms austenite bainite carbides carbon cell cementite chemical potential close-packed coherent composition concentration continuous casting crystal structure curve decreases dendrites diffusion dislocations driving force effect entropy Equation equilibrium shape eutectic eutectoid example ferrite formation Gibbs free energy Gibbs-Thomson effect given GP zones grain boundary grow growth rate habit plane heat heterogeneous nucleation homogeneous nucleation illustrated in Fig incoherent interfaces increase interfacial energy interstitial isotherms jump lath lattice ledges liquid martensitic transformations matrix melting Metallurgical microstructure migration misfit molar free energy mould wall nucleation nucleation rate nucleus occur orientation relationship particles pearlite peritectic phase diagram Phase Transformations planar plate precipitate quenched radius schematically semicoherent interfaces shear shown in Fig shows Society for Metals solid/liquid interface solidification ẞ phase stable steel strain energy supercooling surface T₁ temperature gradient thermal tion twin undercooling vacancies volume weld ΑΙ