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Hardening (metallurgy)
About: Hardening (metallurgy) is a research topic. Over the lifetime, 25584 publications have been published within this topic receiving 376012 citations.
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15 May 2001-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effect on yield stress of predeformation and natural aging prior to a two-stage artificial hardening treatment has been investigated for the 7xxx series alloys AA7108 and AA7030.
Abstract: The effect on yield stress of predeformation and natural aging prior to a two-stage artificial hardening treatment has been investigated for the 7xxx series alloys AA7108 and AA7030. It was found that 10% predeformation in tension reduced the yield stress measured in the T6-state by 7–10%. About half of this reduction could be regained when a preaging period was inserted between the deformation and the artificial aging treatment. The natural aging response was followed also by measurement of electrical conductivity and hardness. Precipitate phases and GP (Guinier–Preston)-zones occurring during the aging treatments were investigated by transmission electron microscopy. The lower yield stress in predeformed samples is explained by early nucleation of the equilibrium phase η on the dislocation network, leaving less solute for formation of the main hardening phase η′ . The reduction in yield stress was partly offset by the preaging, due to recovery processes in the dislocation network.
112 citations
TL;DR: In this paper, the solid-solution hardening potential of the refractory elements rhenium, tungsten and molybdenum in the matrix of single-crystal nickel-based superalloys was experimentally quantified.
112 citations
111 citations
TL;DR: In this paper, different cyclic plastic deformation responses of piping materials (SA333 C-Mn steel and 304LN stainless steel) are experimentally explored, and effects of stress amplitude and mean stress on the ratcheting behaviors are analyzed.
111 citations
TL;DR: In this article, the effect of strain hardening on the flow behavior of superplastic copper alloy Coronze 638 has been analyzed and it was shown that grain growth at low strain rates causes sufficient hardening to compensate for the low strain rate sensitivity, thus preventing the development of sharp necks.
111 citations