Influence of Ag and processing routes on the Portevin-Le Châtelier behavior of Al-Mg based alloys
Year: 2024
Type: article
Abstract: This study investigates the influence of Ag and processing routes on the evolution of Portevin-Le Châtelier (PLC) behavior of 5xxx aluminum alloys . Results indicate that the modified alloy, enhanced with the alloying element Ag, can suppress the serrated yielding behavior and increase the strength by approximately 80 MPa during aging treatment. Ag atoms promote stable Mg-Ag cluster and reduce solute Mg atoms in the matrix, which weakens the pinning effect on dislocations. Furthermore, compared to the T6 process, the critical strain of the T8 process alloy reaches a maximum of about 12 %. The serrated flow propagation characteristics gradually transition from continuous propagation to a combination of continuous and spatial jumping propagation. This behavior results from pre-deformation prior to aging, which facilitates the formation of additional substructures and forest dislocations that are uniformly distributed during the subsequent aging recovery process.
Authors: Cheng Guo, Fang Chen, Haoshang Liu, Xinru Shao, Haitao Zhang, Wei Chen, Zibin Wu, Xingang Liu, Hiromi Nagaumi
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,500
Awards: G7274820488, G7948413071, G8397468114
OpenAlex ID: W4405861953