Temperature-dependent formation of gradient structures with anomalous hardening in an Al–Si alloy

Xiaolong Ma; Matthew Olszta; Jia Liu; Miao Song; Mayur Pole; Madhusudhan R. Pallaka; Joshua Silverstein; Julian Escobar; Arun J. Bhattacharjee; Sundeep Mukherjee; Arun Devaraj; Bharat Gwalani

doi:10.1016/j.msea.2022.144061

Author(s)

Matthew Olszta
Jia Liu
Miao Song
Mayur Pole
Madhusudhan R. Pallaka
Joshua Silverstein
Julian Escobar
Arun J. Bhattacharjee
Sundeep Mukherjee
Arun Devaraj
Bharat Gwalani

Detail(s)

Original language	English
Article number	144061
Journal / Publication	Materials Science and Engineering A
Volume	858
Online published	27 Sept 2022
Publication status	Published - 14 Nov 2022
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.msea.2022.144061 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85139592608&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(716d948d-2d93-4ecc-9b7f-0ddb1af9530d).html

Abstract

The temperature effect on forming gradient structure in an Al–Si alloy during surface severe deformation is studied in this report. The intermediate temperature (473 K) produces the steepest gradient structure by an anomalous hardening on the top layer compared to lower (300 K) and higher temperature (673 K) counterparts. Our analysis shows profuse aluminum oxide particles in the top layer of the gradient structure under 473 K lead to anomalous hardening by oxide-dispersion strengthening. The counterintuitive enhancement of strengthening at the intermediate temperature is explained by the dynamic interplay between thermal-driven, mechanical-aided oxidation and the wear-induced loss of surface materials as a function of temperature, which yields a critical processing temperature to achieve the steepest gradient structure.

Research Area(s)

Gradient steepness, Gradient structure, Oxide dispersion strengthening, Surface severe deformation, Temperature effect

Citation Format(s)

[ RIS ] [ BibTeX ]

Temperature-dependent formation of gradient structures with anomalous hardening in an Al–Si alloy. / Ma, Xiaolong; Olszta, Matthew; Liu, Jia et al.
In: Materials Science and Engineering A, Vol. 858, 144061, 14.11.2022.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Ma, X, Olszta, M, Liu, J, Song, M, Pole, M, Pallaka, MR, Silverstein, J, Escobar, J, Bhattacharjee, AJ, Mukherjee, S, Devaraj, A & Gwalani, B 2022, 'Temperature-dependent formation of gradient structures with anomalous hardening in an Al–Si alloy', Materials Science and Engineering A, vol. 858, 144061. https://doi.org/10.1016/j.msea.2022.144061

Ma, X., Olszta, M., Liu, J., Song, M., Pole, M., Pallaka, M. R., Silverstein, J., Escobar, J., Bhattacharjee, A. J., Mukherjee, S., Devaraj, A., & Gwalani, B. (2022). Temperature-dependent formation of gradient structures with anomalous hardening in an Al–Si alloy. Materials Science and Engineering A, 858, Article 144061. https://doi.org/10.1016/j.msea.2022.144061

Ma X, Olszta M, Liu J, Song M, Pole M, Pallaka MR et al. Temperature-dependent formation of gradient structures with anomalous hardening in an Al–Si alloy. Materials Science and Engineering A. 2022 Nov 14;858:144061. Epub 2022 Sept 27. doi: 10.1016/j.msea.2022.144061

Ma, Xiaolong ; Olszta, Matthew ; Liu, Jia et al. / Temperature-dependent formation of gradient structures with anomalous hardening in an Al–Si alloy. In: Materials Science and Engineering A. 2022 ; Vol. 858.