Deformation Behaviors around/at the Interface between Zn-electrodeposition and Fe-substrate
| Autor: | Hiroyuki Ohtsubo, Tadanobu Okamoto, Kiyomichi Nakai |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Slip (materials science) law.invention Crystallography Optical microscope Shear (geology) Mechanics of Materials law Critical resolved shear stress Ultimate tensile strength Materials Chemistry Deformation (engineering) Composite material Crystal twinning Burgers vector |
| Zdroj: | ISIJ International. 44:914-918 |
| ISSN: | 0915-1559 |
| Popis: | In order to examine the deformation behaviors at/around the interface between η-Zn electrodeposited layer and α-Fe substrate with Burgers orientation relationship, (110) Fe //(0001) Zn and [111] Fe //[1120] Zn , slip systems operated at/around the interface have been analyzed using X-ray back-reflection Laue method, optical microscope and stereographic analyses. The Zn-electrodeposited specimen was deformed at room temperature under a tensile strain rate of 2.8×10 -3 /s. Under low tensile strains below 10%, slip systems having large Schmid factor operate in Fe-substrate. In Zn-layer, slip systems having smaller Schmid factor operate to relax the tensile strain at the interface due to deformation in Fe-substrate, suggesting the constraint due to the cohesion at the Zn/Fe interface. As increasing the tensile strain, the slip systems forming corrugated configuration operate in Fe-substrate and their shear strains at the interface are difficult to be relaxed smoothly by deformation of Zn-layer. As increasing tensile strain, twinning occurs in Zn-layer and the slip system with low critical resolved shear stress operates in the twinned region. The decohesion of Zn-layer from Fe-substrate is induced as increasing the twinned region in Zn-layer. |
| Databáze: | OpenAIRE |
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