Weldability of High-tensile Steels from Experience in Airplane Construction, with Special Reference to Welding Crack Susceptibility (1935)
NASA Technical Reports Server (NTRS) · leaf 27
Figs. 3f4f6f9t9a,12 N.A. C.A. Technical Memorandum Ho. 779 at Specimen figure 9.- Overheat zone of a hf Clamp very susceptible cf Nuts carbon steel with its peculiar df Clamp stirrup ferrite spots. … non-conducive carbon steel; ferrite as net work and Figure 12.- Bending test. Widmannstatten needles.
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
![An illustration from The American archaeologist [serial] (1898)](https://img.insideoutlibrary.com/img/200/ia-americanarchaeol02colu-187-100.webp)
