Abstract
Copper (and its alloys) and iron or steel form two groups of metals that have been utilized since the ancient times. More recently, aluminium and its alloys have found many applications, thus forming three important metallic groups. When we compare the low-temperature flow stresses of these three kinds of metals, we find that that of Fe is much higher than the other two: at liquid nitrogen temperature usual steels can no longer be plastically deformed without fracture. From the fact that Fe has body-centered cubic (bcc) structure while Cu and Al have face-centered cubic (fcc) structure, such a difference in low-temperature plasticity is considered to be due to the difference in crystal structure. In fact, while all pure fcc metals exhibit weak temperature dependence of the yield stress, metals with bcc structure show, without exception, a strong temperature dependence. In this chapter, we describe characteristic plastic behavior of bcc metals and its interpretation.
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Suzuki, T., Takeuchi, S., Yoshinaga, H. (1991). Dislocations in bcc Metals and Their Motion. In: Dislocation Dynamics and Plasticity. Springer Series in Materials Science, vol 12. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-75774-7_6
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DOI: https://doi.org/10.1007/978-3-642-75774-7_6
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