Metallurgy; an introduction to the study of physical metallurgy . esenting its while in the simple binary case these verticals were erectedon a single hne and could thus be shown on a single sheet ofpaper, in the ternaries the result will be a model in whichsurfaces take the place of the simple lines of the binarydiagram. Thus we may erect verticals representing the tem-perature at which solidification begins, and the ends of these 126 STUDY OP PHYSICAL METALLURGY verticals -will all lie in a surface which is tlie melting or freezing*point surface (generally called the liquidus
Metallurgy; an introduction to the study of physical metallurgy . esenting its while in the simple binary case these verticals were erectedon a single hne and could thus be shown on a single sheet ofpaper, in the ternaries the result will be a model in whichsurfaces take the place of the simple lines of the binarydiagram. Thus we may erect verticals representing the tem-perature at which solidification begins, and the ends of these 126 STUDY OP PHYSICAL METALLURGY verticals -will all lie in a surface which is tlie melting or freezing*point surface (generally called the liquidus ) of the best way of showing such a surface is of course by meansof an actual solid model, but a perspective view affords a good-general idea of the features met with in a simple case, and this-is shown in Fig. 43, which refers to the liquidus of the alloys oflead, tin and bismuth as determined by Charpy ()?. A wx>r&complex case, one small part of which has been very carefuUystudied in the authors laboratory (^*), is represented in Fig. 44,. Sn. Tig. 43.—LiquidAJis Surfaces for the Constitutional Model of s TernaryAlloy System. (Alloys of Lead, Tin and Antim«ny.} Plate IX, which is a photograph of the actual sohid model, onwhich the contour lines or lines of equal temperature have beendrawn. This figure relates to the alloys lying near the coppercorner of the ternary system : copper-aluminium-manganese. Besides the use of solid models and perspective views, theresults of the investigations of ternary alloys can also berepresented both by sections and by projections of the linesand surfaces of the model. The use of vertical sections alonglines either radiating from one corner of the basal triangle orlying parallel to one of the sides is most useful in the construe-- PLATE IX.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
