Investigation on the Strengthening Mechanism of Flow Control Extrusion by Using Experiment and Numerical Simulation

Materials

Guangshan Wu¹  Fei Chen¹  Yangqi Li¹ 

[1] Department of Plasticity Technology, National Engineering Research Center of Die and Mold CAD, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China;

关键词: heterostructure;    strengthening mechanism;    flow control extrusion;   

DOI  :  10.3390/ma14175001

来源: DOAJ

【 摘 要 】

Bimodal grain structure leads to high strength and strain hardening effect of metallic materials. In this study, an effective approach called flow control extrusion (FCE) is proposed to achieve heterostructures of pure copper. Compared with conventional extrusion (CE), FCE shows much stronger grain refine ability and much weaker grain orientation concentration. The significant grain refinement and heterostructures depend on the severe shear strain from FCE. The heterostructures of sample subject to FCE transfer from bimodal structure to gradient structure with the decrease of temperature, as the grains in the surface of sample are all refined to ultrafine scale. Both these two heterostructures can realize the improvement of strength and strain hardening effect simultaneously.

【 授权许可】

Unknown