Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient

Wang YF, Huang CX, Fang XT, Höppel HW, Göken M, Zhu YT (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Scripta Materialia Elsevier

Book Volume: 174

Pages Range: 19-23

DOI: 10.1016/j.scriptamat.2019.08.022

Abstract

Hetero-deformation induced (HDI) hardening has been attributed to geometrically necessary dislocations (GNDs) that are needed to accommodate strain gradient near the interfaces of heterostructured domains. Here we report that HDI hardening does not increase linearly with increasing strain gradient in the interface-affected zone. This is because some GND pileups may be absorbed by the interface and consequently does not contribute to HDI hardening with increasing strain gradient. Higher mechanical incompatibility across interface produces higher strain gradient. The strain gradient-dependent strengthening effect of heterostructured interface mainly originates from the development of HDI stress.

Authors with CRIS profile

Heinz Werner Höppel Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

North Carolina State University US United States (USA) (US) Sichuan University (SCU) / 四川大学 CN China (CN)

How to cite

APA:

Wang, Y.F., Huang, C.X., Fang, X.T., Höppel, H.W., Göken, M., & Zhu, Y.T. (2020). Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient. Scripta Materialia, 174, 19-23. https://doi.org/10.1016/j.scriptamat.2019.08.022

MLA:

Wang, Y. F., et al. "Hetero-deformation induced (HDI) hardening does not increase linearly with strain gradient." Scripta Materialia 174 (2020): 19-23.

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