Interface affected zone for optimal strength and ductility in heterogeneous laminate

Huang CX, Wang YF, Ma XL, Yin S, Höppel HW, Göken M, Wu XL, Gao HJ, Zhu YT (2018)

Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Materials Today Elsevier

Publisher: ELSEVIER SCI LTD

Book Volume: 21

Pages Range: 713-719

Journal Issue: 7

DOI: 10.1016/j.mattod.2018.03.006

Abstract

Interfaces have been reported to significantly strengthen and toughen metallic materials. However, there has been a long-standing question on whether interface-affected-zone (IAZ) exists, and how it might behave. Here we report in situ high-resolution strain mapping near interfaces in a copper-bronze heterogeneous laminate, which revealed the existence of IAZs. Defined as the zone with strain gradient, the IAZ was found to form by the dislocations emitted from the interface. The IAZ width remained largely constant with a magnitude of a few micrometers with increasing applied strain. Interfaces produced both back stress strengthening and work hardening, which led to both higher strength and higher ductility with decreasing interface spacing until adjacent IAZs started to overlap, after which a tradeoff between strength and ductility occurred, indicating the existence of an optimum interface spacing for the best mechanical properties. These findings are expected to help with designing laminates and other heterogeneous metals and alloys for superior mechanical properties.

Authors with CRIS profile

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

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

Layered Lightweight Composites and Graded Materials (EXC315 EAM (E3)) Exzellenz-Cluster Engineering of Advanced Materials Nov. 1, 2012 - Oct. 31, 2017

Involved external institutions

Brown University US United States (USA) (US) Sichuan University (SCU) / 四川大学 CN China (CN) North Carolina State University US United States (USA) (US) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN)

How to cite

APA:

Huang, C.X., Wang, Y.F., Ma, X.L., Yin, S., Höppel, H.W., Göken, M.,... Zhu, Y.T. (2018). Interface affected zone for optimal strength and ductility in heterogeneous laminate. Materials Today, 21(7), 713-719. https://dx.doi.org/10.1016/j.mattod.2018.03.006

MLA:

Huang, C. X., et al. "Interface affected zone for optimal strength and ductility in heterogeneous laminate." Materials Today 21.7 (2018): 713-719.

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