Heat treatment processes are conducted in steel specimens. As a result, these specimens may become more Brittle/Ductile (B/D). When relating the energy lost to fracture (ELF) and the mechanical properties above, show the relationship between ELF and B/D. (i.e., increasing ELF → increasing B/D or vice versa)

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Engineering Drawing

Technical drawing has been around since ancient times. As in the ancient Renaissance, complicated drawings were created, including Leonardo da Vinci's drawing. Modern engineering drawing, including its specific orthographic projection with scale conventions, began in Europe (France) during the early stages of Industrialization. L.T. C. Rolt also made some of Marc's drawings for its block-making machinery (in 1799) that also may have contributed significantly to British engineering technology. Since he learned the art of presenting three-dimensional(3D) items in a two-dimensional(2D) plane, as we now term mechanical drawing.