. Transactions. d air. 79,0 Tested in boiling water. I Tested in hot Tested in electric furnace. Short heating. Clamps not upto temperature of furnace. VOL. LX. 33. 514 EFFECT OF TEMPERATURE, ETC. ON IROIP^RTIEH; OF METALS move by displacement along cleavage or gliding planes and the atomswithin one such block or fragment remain at the end of deformation inabout the same positions, relative to one another, as they had beforedeformation. The atoms within one fragment, however, have changed
. Transactions. d air. 79,0 Tested in boiling water. I Tested in hot Tested in electric furnace. Short heating. Clamps not upto temperature of furnace. VOL. LX. 33. 514 EFFECT OF TEMPERATURE, ETC. ON IROIP^RTIEH; OF METALS move by displacement along cleavage or gliding planes and the atomswithin one such block or fragment remain at the end of deformation inabout the same positions, relative to one another, as they had beforedeformation. The atoms within one fragment, however, have changed ^ ^^J fiue Gn in Note: Tensile strength increase aa grain size decreases and a3 rate at applying lead increases. ^ ^^ ^ ///^^ K >^ ? \ i 1 i^^ ^ fc .r.^ 1 Melting?§— Point ....... - 1 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 Absolute Tennpetature Fig. 43.—Tensile strength of annealed copper wire in. diam. with VARIATIONS in TEMPERATURE, GRAIN SIZE AND R.\TE OF 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 13C0 1400 Absolute Temperature Fig. 44.—Per cent, elongation in 2 in. of annealed copper wire IN. DIAM. with variations in temperature, grain size and rate of LOADING. their positions with reference to atoms of another fragment. Themovement of these relatively large blocks of atoms would take placemuch more iai)idly than a movement in which each atom had to moverelative to each other atom. The quantity of defoimation possible in an amorplious substance atrelatively high temperatures should have only atomic dimensions as its ZAY JEFFRIES 515 limit. The aniount of deformation by tension has a definite limit butvaries with the temperature and rate of loading. We are all familiarwith the permanent deformation of glass tubes and rods that have beenstored for months in a bent position; the bends become permanent intime. If an attempt is made to permanently deform the glass the sameamount in a few seconds or even in a
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
