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- W142859211 abstract "The room-temperature hardness of iodide chromium containing binary additions of Group IV-A to VIII metals (Ti, Zr, Hf, V, Nb, Ta, Mo, W, Mn, Re, Fe, Ni, Co, Ru, Rh, Pd, Os, Ir, and Pt) up to 65 at. % was investigated. Each alloy series, as arc-cast or homogenized, showed a hardness minimum as a function of alloy concentration near 0.5 at. %. The initial softening amounted to 1 to 20% and was followed by solid-solution hardening. Softening by lowering the elastic modulus or changing the nature of grain boundaries by alloying appeared minor. A plausible explanation based on thermodynamic evidence suggests alloying decreases interstitial solubility. Thus interstitial compound formation takes place at a higher temperature, thereby making agglomeration kinetically more favorable and resulting in overaging and softening. Furthermore, the softening effect was similar in magnitude to nitrogeninduced quench hardening. Group VII-A and VIII but not IV-A to VI-A additions to Cr at about the solid-solubility limits tended to cause mechanical twinning about hardness impressions. Paralleling reported results for W and Mo, increasing the average group number above 8 promotes twinning and suggests alloying decreases the twin boundary energy. Large solid- solution additions of Re to Cr caused significant increasesmore » in hardness up to 1100 deg C. A characteristic hardness break was exhibited at about half the absolute solidus temperature. (auth)« less" @default.
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- W142859211 date "1963-09-01" @default.
- W142859211 modified "2023-09-27" @default.
- W142859211 title "THE HARDNESS BEHAVIOR OF CHROMIUM ALLOYED WITH GROUP IV-A TO VIII TRANSITION METALS" @default.
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