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Phenomenon of Partial and Complete Restoration of Elastic
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aggregate amount annealed annulus appears basic slag bond boric acid bricks bulk density calcium aluminate calcium fluoride carbon Ceramic Society Chesters chromite Collapse compression cordierite crucible curve dead-burned magnesite decrease doublet doubly-refracting material duralumin effect electrically-fused magnesite equation extension firing shrinkage fracture gauge-length give given in Table grains Hartmann lines helical spring increasing the moulding induction furnace investigation iron layer load Mark maximum shear stress melt metal mild heat treatment mixtures obtained occur oxidation oxidising oxygen penetration periclase periclase crystals permanent distortion permeability plastic porosity porous properties proportional limit proportional limit stress radius ratio reflexion refractoriness-under-load refractory restoration of elasticity rupture scale shear stress shown in Fig shows slag slag resistance soft steel spalling specific gravity specimen Steel Institute strain stress concentration stress distribution structure surface temperature tensile strength tension test-pieces thermal expansion tons per sq torque torsional overstrain X-ray yield point