Metallurgy; an introduction to the study of physical metallurgy . s and the a bodyof the zinc-copper alloys is in many respects very close ; underthe influence of mechanical work and annealing both thesebodies assume the rectilinear forms characteristic of twinnedcrystals, such as that illustrated in Fig. 55, Plate XI. Thea body of the aluminium-copper series behaves in a similarmanner. Alloys lying in the short range between the points R and Sin the diagram correspond to the second group of the zinc-copper alloys to this extent, that while their sohdification beginsby the deposition of the a
Metallurgy; an introduction to the study of physical metallurgy . s and the a bodyof the zinc-copper alloys is in many respects very close ; underthe influence of mechanical work and annealing both thesebodies assume the rectilinear forms characteristic of twinnedcrystals, such as that illustrated in Fig. 55, Plate XI. Thea body of the aluminium-copper series behaves in a similarmanner. Alloys lying in the short range between the points R and Sin the diagram correspond to the second group of the zinc-copper alloys to this extent, that while their sohdification beginsby the deposition of the a body, it is completed, along the lineRS, by deposition of /3. Only those near the point R, however,lying vertically above the curve RT, are completely trans-formed into a, even by very slow coohng. Those lying to theright of the composition corresponding to the point T undergoa transformation whereby the /3 originally present is trans-formed finally into a mixture of a and S phases. Accordingto the diagrams of Heycook and Neville, and of Shepherd and PLATE Fig 5S. Pig. 59.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
