Work

Effects of Ni Content and Alloying Elements on Electrical Conductivity, Mechanical Properties, and Hot Tearing Susceptibility of Al-Ni-Based Alloys

Year: 2023

Type: conference-paper

Abstract: The Aluminum-Nickel alloy system exhibits good potential for rotor applications in electric vehicles, which require good castability, high electrical conductivity (EC), and mechanical strength. In the present study, the microstructure, hot tearing susceptibility (HTS), electrical conductivity, and mechanical properties of binary Al-xNi (x: 1 to 5% wt%) alloys were investigated. The results showed that the Al-1Ni alloy exhibited the highest EC of 57.6% IACS. However, increasing the Ni content to 5% led to a decrease in EC and a significant reduction in HTS. In addition, increasing the Ni content from 1 to 5% slightly enhanced the yield strength from 70.4 to 83.2 MPa showing a weak strengthening effect. The effect of Si and Mg addition on the strength and EC of Al-1Ni alloy was studied. By adding 0.6% Si and 0.6% Mg to the Al-1Ni alloy, the yield strength was enhanced to 156.6 MPa after T5 and 287.5 MPa after T6, respectively, while maintaining a high EC (51% IACS). The significant improvement in yield strength was attributed to the presence of nanosized MgSi precipitates as the strengthening phase, which was confirmed by TEM analysis.

Source: INALCO

DOI: 10.3390/engproc2023043003

Authors: Farnaz Yavari, Ahmed Y. Algendy, Mousa Javidani, Lei Ray Pan, X.-Grant Chen

Institutions: Université du Québec à Chicoutimi, Rio Tinto (Canada)

Language: English

Topic: Aluminum Alloy Microstructure Properties

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: Centre québécois de recherche et de développement de l’aluminium, Natural Sciences and Engineering Research Council of Canada

Awards: G2148387222, G347473588