Journal ArticleDOI
The influence of polycrystal grain size on several mechanical properties of materials
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In this article, the authors used the Hall-Petch relations to describe the complete stress-strain behavior for polycrystals and provided a reference for understanding the manner in which these other properties should also depend on the grain size.Abstract:
The ductile-brittle transition, hardness, fatigue, and creep behavior of polycrystalline materials are known to be influenced under certain conditions by the polycrystal grain size. These properties have been correlated, historically, with the material stress-strain behavior. The (Hall-Petch) stress-grain size relations are useful for describing the complete stress-strain behavior for polycrystals and, therefore, these relations provide a reference for understanding the manner in which these other properties should also depend on the grain size. In some cases, the grain size dependence of a particular property follows directly from this connection.read more
Citations
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Journal ArticleDOI
The influence of grain boundaries on mechanical properties
TL;DR: The effect of interfaces on mechanical properties is considered in this paper, with emphasis on dislocation mechanisms and the atomic scale structure of boundaries, and Elastic and plastic compatibilities at boundaries are treated.
Journal ArticleDOI
Six decades of the Hall–Petch effect – a survey of grain-size strengthening studies on pure metals
TL;DR: In this paper, the authors gather the grain-size strengthening data from the Hall-Petch studies on pure metals and use this aggregated data to calculate best estimates of these metals' Hall-petch parameters.
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Grain refinement in 7075 aluminum by thermomechanical processing
TL;DR: In this article, a thermomechanical process for grain refinement in precipitation hardening aluminum alloys is reported, which includes severe overaging, deformation, and recrystallization steps.
Journal ArticleDOI
Polycrystalline strengthening
TL;DR: In this paper, the strength of polycrystalline specimens can be related to interaction phenomena taking place during elastic and plastic deformation, such as macroscopic and microscopic strain accommodation processes required to maintain strain continuity across the grain boundaries.
Journal ArticleDOI
Roughness-Induced Crack Closure: An Explanation for Microstructurally Sensitive Fatigue Crack Growth
TL;DR: In this paper, the concept of roughness-induced crack closure is utilized to explain the role of prior austenite grain size and pearlite interlamellar spacing on near-threshold fatigue crack propagation in fully pearlitic eutectoid steel tested at low and high stress ratio in lab air and purified helium.
References
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Journal ArticleDOI
The Deformation and Ageing of Mild Steel: III Discussion of Results
TL;DR: In this paper, an attempt is made to explain the observed phenomena in the yielding and ageing of mild steel, described in two previous papers, in the general terms of a grain-boundary theory.
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The Hardness of Metals
TL;DR: Hardness measurements with conical and pyramidal indenters as mentioned in this paper have been used to measure the area of contact between solids and the hardness of ideal plastic metals. But they have not yet been applied to the case of spherical indenters.
Journal ArticleDOI
The plastic deformation of polycrystalline aggregates
TL;DR: For a number of metallic polycrystalline aggregates, it was shown experimentally that flow stress at constant strain is related to the grain diameter l by where [sgrave]0 and k are constants as discussed by the authors.