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Strengthening Mechanisms in Sapphire
1975Strengthening of sapphire by work hardening, solid solution hardening and precipitation hardening is described. Examination of the dislocation structures in pure sapphire deformed by basal glide has led to the development of a semi-quantitative work hardening model; edge dipoles, formed by trapping of dislocations on parallel slip planes, are the ...
B. J. Pletka +2 more
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Strengthening mechanisms of iron micropillars
Philosophical Magazine, 2014We examine the size effect and strengthening mechanisms of bcc iron pillars. The single-crystal pillars were machined with focused ion beam and tested with a nanoindentation device with the compression axis along the crystallographic direction. We compare our test results with both older literature on whiskers and micro/macro specimens, and recent ...
B.R.S. Rogne, C. Thaulow
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2010
Abstract This chapter discusses the metallurgical changes that occur and the improvements that can be achieved in superalloys through solid-solution hardening, precipitation hardening, and dispersion strengthening. It also explains how further improvements can be achieved through the control of grain structure, as in columnar-grained ...
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Abstract This chapter discusses the metallurgical changes that occur and the improvements that can be achieved in superalloys through solid-solution hardening, precipitation hardening, and dispersion strengthening. It also explains how further improvements can be achieved through the control of grain structure, as in columnar-grained ...
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Strengthening mechanisms in nanostructured aluminum
Materials Science and Engineering: A, 2008Structural parameters that characterize deformation produced nanostructures are the structural morphology, boundary spacing, boundary misorientation and interior dislocation density. These parameters have been determined and related to the yield stress of nanostructured Al produced by accumulative roll bonding (ARB) based on mechanisms such as ...
X. Huang, N. Kamikawa, N. Hansen
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Strengthening mechanisms in Cu3Au
Acta Metallurgica, 1978The effect of temperature and strain rate on the mechanical behavior of originally disordered and ordered polycrystalline Cu3Au was investigated in the range 273–648 K. While stress-strain curves exhibit serrations identical to those attributable to dynamic strain aging, no correlation seems to exist between the presence of the serrations and the yield
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Strengthening Mechanisms in Fatigue
1970The present state of knowledge of the role of metallurgical structure in the achievement of high fatigue resistance is critically examined and the application of such knowledge is discussed. At the present time resistance to fatigue is best characterized in terms of phenomenological parameters such as the cyclic strain hardening exponent. The effect of
CE Feltner, P Beardmore
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Creep Strengthening Mechanisms
1982In the choise of the materials for the most crytical high temening mechanisms in superalloys. Solid solution-, particle-, and dislocation-strengthening are considered in dislocation creep. σ∘ concept is discussed and σ∘ data of superalloys reported. Diffusional creep and grain boundary sliding are also examined.
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Mechanical Properties and Strengthening Mechanisms
2011Abstract This chapter introduces the concepts of mechanical properties and the various underlying metallurgical mechanisms that can be used to alter the strength of materials. The mechanical properties discussed include elasticity, plasticity, creep deformation, fatigue, toughness, and hardness.
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Strengthening Mechanisms in Mg97Zn1Y2 Alloys
2015We elucidate the strengthening mechanisms of Mg-Zn-Y alloys containing long-periodic stacking ordered (LPSO) structures, based on comprehensive electron microscopy investigations. Kinking of the LPSO structures is not only an important way to accommodate plastic deformation effectively, but also simultaneously strengthens the alloy as a result of ...
Zhiqing Yang, Hengqiang Ye
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Strengthening Mechanisms in Nanostructured Materials
2022Understanding the behavior of materials with nanoscale features is important because of both the size of engineering devices and the internal microstructure of more bulk materials. Many electronic components have been miniaturized in recent years to attend the high demand of technology development. Similarly, new stronger bulk metallic materials use nm-
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