Journal article
Plasticity in Materials with Heterogeneous Microstructures
Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.47(12), pp.6608-6620
12/2016
Handle:
https://hdl.handle.net/2376/105799
Abstract
The heterogeneous microstructure has a predominant effect on the mechanical behavior of polycrystalline material. In most instances, a homogenized parameter such as mean grain size is used to describe and to represent the microstructure. However, these models do not account for a measure of heterogeneity in the grain size and grain shape distributions. In this work, we introduce the grain size distribution into a multi-scale stress–strain-gradient model using a controlled Poisson Voronoi tessellation. The correlation between grain size distribution and strength is studied with various cases of grain size distribution with a fixed grid area and mean grain size. In addition, the effect of the spatial distribution of second phases and grain size on the material strength and ductility is also investigated. The results show that introducing heterogeneity into the microstructure can enhance the strength and ductility of the material compared with its equivalent homogeneous microstructure. In addition, different spatial distributions of phases can also lead to different mechanical responses.
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Details
- Title
- Plasticity in Materials with Heterogeneous Microstructures
- Creators
- Hao Lyu - School of Mechanical and Materials Engineering Washington State University Pullman WA 99163 USAAnnie Ruimi - Department of Mechanical Engineering Texas A&M University at Qatar Doha 23874 QatarDavid Field - School of Mechanical and Materials Engineering Washington State University Pullman WA 99163 USAHussein Zbib - School of Mechanical and Materials Engineering Washington State University Pullman WA 99163 USA
- Publication Details
- Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.47(12), pp.6608-6620
- Academic Unit
- Mechanical and Materials Engineering, School of
- Publisher
- Springer US; New York
- Identifiers
- 99900547001301842
- Language
- English
- Resource Type
- Journal article