Metallurgy; an introduction to the study of physical metallurgy . Fig. v.^ « ?\405:nSu-^. Fig. 99 Fig. 101. \_Toface p. 243. STRUCTURE OF METALS UNDER STRAIN 243 Mgs. 97 to 101. Figs. 97 and 98, Plate XX., show the same fieldof view, in iron, before the commencement of straining and aftera considerable amount of plastic strain has taken place. Figs. 99and 100, Plate XXI., show the black fines in lead (at 150 and1,000 diameters respectively), and Fig. 101, Plate XXI., innickel steel. If the process of straining is carried further,the number and apparent width of the black fines-increasesu
Metallurgy; an introduction to the study of physical metallurgy . Fig. v.^ « ?\405:nSu-^. Fig. 99 Fig. 101. \_Toface p. 243. STRUCTURE OF METALS UNDER STRAIN 243 Mgs. 97 to 101. Figs. 97 and 98, Plate XX., show the same fieldof view, in iron, before the commencement of straining and aftera considerable amount of plastic strain has taken place. Figs. 99and 100, Plate XXI., show the black fines in lead (at 150 and1,000 diameters respectively), and Fig. 101, Plate XXI., innickel steel. If the process of straining is carried further,the number and apparent width of the black fines-increasesuntil they form a very close network, which becomes fracture is approached this confusion leads to a generalroughening of the surface, which prevents sharp focussing withthe microscope, but, evenclose to a tensile fracture, thelines can be seen in very largenumbers crossing one anotherin various directions. The true nature of theselines is now well understood,and is summed up in the name sfip bands which is givento them. Their origia fies inthe fact that whe
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
