Metallurgy; an introduction to the study of physical metallurgy . liquidus,forming the lower boundary of theregion in which the alloys are com-pletely liquid; the solidus isindicated by the line AsB, and therelations of the cooling-curves tothe diagram are indicated by thedotted lines representing the inverse-rate cooUng curves of a few of thealloys of the series. The shape ofthe liquidus curve in such a systemof alloys, however, is not always ofthe kind indicated in Fig. 33. Incertain cases the curve either droopsor rises in the c6ntre, although it isnot quite certain whether in such cases sp
Metallurgy; an introduction to the study of physical metallurgy . liquidus,forming the lower boundary of theregion in which the alloys are com-pletely liquid; the solidus isindicated by the line AsB, and therelations of the cooling-curves tothe diagram are indicated by thedotted lines representing the inverse-rate cooUng curves of a few of thealloys of the series. The shape ofthe liquidus curve in such a systemof alloys, however, is not always ofthe kind indicated in Fig. 33. Incertain cases the curve either droopsor rises in the c6ntre, although it isnot quite certain whether in such cases special disturbing causes may be at work, such as theformation of a chemical compound between the two metals,the compound, however, being completely soluble in eitherof the constituent metals. With such questions we need not,however, concern ourselves here—the typical form of theliquidus curve of a series of alloys forming soUd solutions isthat of a smooth, continuous curve showing no sharp breakor angle. With this continuous form of curve the H. Fig. 32.—Cooling Curveehowing the Freezing-Range of an Alloy form-ing a Solid Solution. 98 STUDY OP PHYSICAL METALLURGY of such alloys correspond very closely, also forming acontinuous series without sharp breaks or changes ofproperties. While the class of alloys consisting of metals entirely insolublein one another in the sohd state may safely be regarded as anideal case never met with in practice, the class of alloys whoseconstituent metals are mutually soluble in all proportions in thesohd state is met with in quite a number of cases of actualbinary systems. In the greater number of cases, however, \
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
