Interface affected zone for optimal strength and ductility in heterogeneous laminate

Journal article

Publication Details

Author(s): Huang CX, Wang YF, Ma XL, Yin S, Höppel HW, Göken M, Wu XL, Gao HJ, Zhu YT
Journal: Materials Today
Publication year: 2018
Volume: 21
Journal issue: 7
Pages range: 713-719
ISSN: 1369-7021
eISSN: 1873-4103


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.

FAU Authors / FAU Editors

Göken, Mathias Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Höppel, Heinz Werner PD Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

External institutions with authors

Brown University
Chinese Academy of Sciences (CAS) / 中国科学院
North Carolina State University
Sichuan University (SCU) / 四川大学

How to cite

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.

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


Last updated on 2019-01-08 at 15:17