Synergetic Strengthening by Gradient Structure

By Xiaolei Wu, Peng Jiang, Longxin Chen, Jun Zhang, Fang Yuan, Yuntian Zhu. Heterostructured Materials, 2014

491 citations recorded by the source corpus.

Gradient structures are characterized with a systematic change in microstructures on a macroscopic scale. Here, we report that gradient structures in engineering materials such as metals produce an intrinsic synergetic strengthening, which is much higher than the sum of separate gradient layers. This is caused by macroscopic stress gradient and the bi-axial stress generated by mechanical incompatibility between different layers. This represents a new mechanism for strengthening that exploits the principles of both mechanics and materials science. It may provide for a novel strategy for designing material structures with superior properties.

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/c629a72c3434b59d913ebb572cb210dd40e7d2ae

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In Materials Chemistry

Citations in the corpus

Heterogeneous materials: a new class of materials with unprecedented mechanical properties (2017, background): “This strain gradient needs to be accommodated by geometrically necessary dislocations, which will make the softer phase appear stronger [33,48], leading to synergetic strengthening to increase the global measured yield strength of the material [29].”
Combining Gradient Structure and TRIP Effect to Produce Austenite Stainless Steel with High Strength and Ductility (2016, background): “2 and εu may be optimized by adjusting either the SMAT processing period or sample thickness [34].”
Heterostructured materials: superior properties from hetero-zone interaction (2020, background): “GS materials have been reported to exhibit synergistic strengthening [27,28], in which the global yield strength is higher than what is predicted on the basis of the rule-of-mixtures (ROM) of the strengths of constituent layers [28].”
Critical microstructures and defects in heterostructured materials and their effects on mechanical properties (2020, background): “Such deviation has been attributed to the synergistic strengthening in the HS material [14,19].”
On Strain Hardening Mechanism in Gradient Nanostructures (2021, methodology): “…of experimental strength-ductility data are obtained from the published stress-strain relations for gradient IF steel samples (Li et al., 2010a; Wu et al., 2014b) with d c ¼ 35 m m, h t ¼ 500 m m but with different surface mechanical attrition treatment times, which generates different topmost…”