Work

The enhance of Al-TCB seed alloy on the corrosion resistance of 7050 alloy by multi-level structures modification

Year: 2025

Type: article

Abstract: Corrosion resistance is among the key elements determining the service life of alloys. The impact of as-cast grain refinement by Al-TCB seed alloy on the corrosion resistance of 7050 alloy under final state was studied. Thus, systematic analyses of immersion and electrochemical corrosion tests proves the pitting and intergranular corrosion resistance of 7050-T alloy are improved by 0.5 % Al-TCB addition compared with 7050 alloy, while the degree of exfoliation corrosion has little change in the strong corrosion environment. The enhancement of pitting and intergranular corrosion resistance is largely due to the modification of multi-level structures of 7050-T alloy by adding Al-TCB seed alloy. Such structures mainly include more discontinuous distributed micron-scale Al 7 Cu 2 Fe phase with smaller size, more fine and dispersed aging precipitates inside grains, less numerous and more discontinuous precipitates with reduced size at grain boundaries, smaller grain size and uniform GND, etc.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.04.012

Authors: Mengxia Han, Weiyi Wang, Guiliang Liu, Xiangfa Liu

Institution: Shandong University

Language: English

Topic: Aluminum Alloy Microstructure Properties

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,640

Funders: Department of Science and Technology of Shandong Province, National Natural Science Foundation of China, Natural Science Foundation of Shandong Province, Key Technology Research and Development Program of Shandong