Metallurgy; an introduction to the study of physical metallurgy . emperatureslying above the line Bc^ will result in the suppression of the^ to a change, and the alloys may even be obtained as a homo-geneous mass of the j8 phase. Here, again, heat-treatment iscapable of profoundly modifying the structure and constitution,and consequently the properties, of the alloys (®). The region of true stability of the /3 body is confined, according to Carpenter {^), to temperatures above 470° C. At thistemperature a hne of small heat-evolutions occurs in the thermalcurves of these alloys, and Carpenter c
Metallurgy; an introduction to the study of physical metallurgy . emperatureslying above the line Bc^ will result in the suppression of the^ to a change, and the alloys may even be obtained as a homo-geneous mass of the j8 phase. Here, again, heat-treatment iscapable of profoundly modifying the structure and constitution,and consequently the properties, of the alloys (®). The region of true stability of the /3 body is confined, according to Carpenter {^), to temperatures above 470° C. At thistemperature a hne of small heat-evolutions occurs in the thermalcurves of these alloys, and Carpenter considers that this indicatesthe decomposition of the phase into a and 7. In accordancewith this view the lines of the diagram starting from the pointsB and C respectively are drawn to meet at the point Cj on theline d^d^. The decomposition of the /3 phase which occursalong this hne is not readily seen under the microscope, nor canthe decomposition products of the pure /3 phase be caused tocoalesce into lumps or laminse visible under moderate magnifi- PLATE XL. Fig. 00.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
