strain R肥 rotation 2040.60.810 20-100+10+20 (a) (b) Fig.2.39.See p.64. ND 500um Fig.7.15.Seep.240
(a) (b) Fig. 2.39. See p. 64. Fig. 7.15. See p. 240
Sum Fig.7.31.See p.257. 15μm RD Fig.13.22(a).Seep.440
Fig. 13.22(a). See p. 440. Fig. 7.31. See p. 257
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SYMBOLS The following notation is generally used in the text.The subscripts i or n indicate the use of letters or numbers for particular symbols.On rare occasions where the letters or symbols are used for other purposes,this is specifically stated. Burgers vector of a dislocation C.Cn-C.Cn.Kn These denote 'local'constants which are defined in the text d Diameter of second-phase particle D Grain or subgrain diameter D Diffusivity (s=bulk diffusion,b=boundary diffusion,c=core diffusion) Fy Volume fraction of second-phase particles G Shear modulus Ei Energy.e.g.stored energy of deformation Ep k Boltzmann constant M Boundary mobility Ny Number of grains or second-phase particles per unit volume Na Number of particles per unit area P or Pi Pressure on a boundary Qor Qi Activation energy,(for diffusion:-s=bulk,b=boundary, c=core) R Grain or subgrain radius s Shear strain t Time T,Tm Temperature,melting temperature (K) Velocity of dislocation or boundary b Volume a,3 Constants \ Energy of an interface or boundary YSFE,YRSFE Stacking fault energy,reduced stacking fault energy b Energy of a high angle boundary Is Energy of a low angle boundary True strain e True strain rate Xxi
SYMBOLS The following notation is generally used in the text. The subscripts i or n indicate the use of letters or numbers for particular symbols. On rare occasions where the letters or symbols are used for other purposes, this is specifically stated. b Burgers vector of a dislocation c,cn,C,Cn,Kn These denote ‘local’ constants which are defined in the text d Diameter of second-phase particle D Grain or subgrain diameter Di Diffusivity (s ¼ bulk diffusion, b ¼ boundary diffusion, c ¼ core diffusion) Fv Volume fraction of second-phase particles G Shear modulus Ei Energy. e.g. stored energy of deformation ED k Boltzmann constant M Boundary mobility Nv Number of grains or second-phase particles per unit volume Ns Number of particles per unit area P or Pi Pressure on a boundary Q or Qi Activation energy, (for diffusion:- s ¼ bulk, b ¼ boundary, c ¼ core) R Grain or subgrain radius s Shear strain t Time T, Tm Temperature, melting temperature (K) v Velocity of dislocation or boundary V Volume , Constants Energy of an interface or boundary SFE, RSFE Stacking fault energy, reduced stacking fault energy b Energy of a high angle boundary s Energy of a low angle boundary " True strain "_ True strain rate xxi
xxii Symbols 0 Misorientation across a boundary 入 Interparticle spacing(defined in equation A2.13) V Poisson ratio o Atomic vibrational frequency Dislocation density n Coincidence grain boundaries.1/n is the fraction of sites common to both grains 0 True stress Shear stress 重，p1,P2 Euler angles(defined in appendix 1) 2 Orientation gradient
Misorientation across a boundary Interparticle spacing (defined in equation A2.13) Poisson ratio 0 Atomic vibrational frequency Dislocation density n Coincidence grain boundaries. 1/n is the fraction of sites common to both grains True stress Shear stress , ’1, ’2 Euler angles (defined in appendix 1) Orientation gradient xxii Symbols