ISSN:
1573-9325
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. The temperature range of blue brittleness is 100° wider in fine-grained mild steel than in coarsegrained, and extends approximately from +100 to +300°C. 2. With all three grain sizes investigated maximum ductility occurs in the temperature range from −100 to +20°C. Maximum permanent elongation occurs at −50°C, and maximum relative transverse contraction after failure occurs in the range from −100 to +50°C. In this range transverse contraction is slightly sensitive to temperature. 3. The methods of optical and electron fractography have revealed, even in tests at very low temperatures, traces of plastic deformation in the fracture, with patterns typical of slip and twinning. The appearance of cleavage tongues is evidently due to the intersection of a cleavage crack with deformation twins generated by a high-stress zone at the tip of a moving crack.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01527442
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