Interface affected zone for optimal strength and ductility in heterogeneous laminate

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Huang CX, Wang YF, Ma XL, Yin S, Höppel HW, Göken M, Wu XL, Gao HJ, Zhu YT
Zeitschrift: Materials Today
Jahr der Veröffentlichung: 2018
Band: 21
Heftnummer: 7
Seitenbereich: 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-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

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

Einrichtungen weiterer Autorinnen und Autoren

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


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.


Zuletzt aktualisiert 2019-01-08 um 15:17