Enhancing strength without compromising ductility in copper by combining extrusion machining and heat treatment
| Autor: | Yao Liu, Songlin Cai, Yun-Jiang Wang, Lanhong Dai, Fengguang Xu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Materials science Metals and Alloys Recrystallization (metallurgy) chemistry.chemical_element 02 engineering and technology Work hardening Strain hardening exponent Microstructure Copper Industrial and Manufacturing Engineering Computer Science Applications 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering Machining chemistry Modeling and Simulation Ceramics and Composites Hardening (metallurgy) Extrusion Composite material |
| Zdroj: | Journal of Materials Processing Technology. 267:52-60 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2018.12.001 |
| Popis: | It is a challenge to produce metallic materials with high strength and good ductility. Improving the strength of metallic materials usually sacrifices the ductility or work-hardening capacity. Here combining extrusion machining and heat treatment, we improve the strength of copper without losing strain hardening capacity and therefore the ductility remains. Copper was first deformed by extrusion machining at shear strain 3.1 and then annealed at 523 K for 5 min. Compared with the initial workpiece, the processed copper possesses five times higher yield strength and alike work hardening behavior. Microstructural characterizations illustrate that high strength and high strain hardening are attributed to the hierarchical microstructure that the recrystallized grains are surrounded by elongated subgrains. Finally, an analytical modeling was employed to rationalize the mechanical properties of copper processed by the proposed strategy. The theoretical results are in agreement with the experimental measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect