Microstructure of gradient Al-1.5Mn alloy and its influence on mechanical response and corrosion behavior

Xuantong Lv; Jiabo Chen; Jiaxing Li; Qianru Zhang; Liankui Wu; Fahe Cao; Shuyan Zhang; Tao Yang; Qingqing Sun

doi:10.1016/j.jallcom.2025.179838

Microstructure of gradient Al-1.5Mn alloy and its influence on mechanical response and corrosion behavior

Xuantong Lv
, Jiabo Chen
, Jiaxing Li
, Qianru Zhang
, Liankui Wu
, Fahe Cao
, Shuyan Zhang
, Tao Yang
, Qingqing Sun^*

^*Corresponding author for this work

Department of Materials Science and Engineering

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

5 Citations (Scopus)

Abstract

The Al-1.5Mn alloy with a gradient microstructure was fabricated by ultrasonic shot peening (USSP). Surface grain size is refined to as small as 150 nm and the depth of USSP affected zone extending approximately 500 μm. Al₆Mn precipitates in the surface layer partially dissolved into Al matrix. USSP significantly improves the surface hardness, yield strength and tensile strength while maintaining an excellent plasticity. Besides strength-plasticity synergy, strength-corrosion resistance synergy was also achieved by this gradient design. The gradient Al-1.5Mn alloy forms a thinner passive film. Enhanced corrosion resistance is primarily attributed to microstructural changes, instead of the residual stress change. © 2025 Elsevier B.V.

Original language	English
Article number	179838
Journal	Journal of Alloys and Compounds
Volume	1022
Online published	19 Mar 2025
DOIs	https://doi.org/10.1016/j.jallcom.2025.179838
Publication status	Published - 10 Apr 2025

Research Keywords

Al-Mn Alloy
Corrosion
Gradient structure
Strength-plasticity synergy

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10.1016/j.jallcom.2025.179838

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title = "Microstructure of gradient Al-1.5Mn alloy and its influence on mechanical response and corrosion behavior",

abstract = "The Al-1.5Mn alloy with a gradient microstructure was fabricated by ultrasonic shot peening (USSP). Surface grain size is refined to as small as 150 nm and the depth of USSP affected zone extending approximately 500 μm. Al6Mn precipitates in the surface layer partially dissolved into Al matrix. USSP significantly improves the surface hardness, yield strength and tensile strength while maintaining an excellent plasticity. Besides strength-plasticity synergy, strength-corrosion resistance synergy was also achieved by this gradient design. The gradient Al-1.5Mn alloy forms a thinner passive film. Enhanced corrosion resistance is primarily attributed to microstructural changes, instead of the residual stress change. {\textcopyright} 2025 Elsevier B.V.",

keywords = "Al-Mn Alloy, Corrosion, Gradient structure, Strength-plasticity synergy",

author = "Xuantong Lv and Jiabo Chen and Jiaxing Li and Qianru Zhang and Liankui Wu and Fahe Cao and Shuyan Zhang and Tao Yang and Qingqing Sun",

year = "2025",

month = apr,

day = "10",

doi = "10.1016/j.jallcom.2025.179838",

language = "English",

volume = "1022",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Microstructure of gradient Al-1.5Mn alloy and its influence on mechanical response and corrosion behavior

AU - Lv, Xuantong

AU - Chen, Jiabo

AU - Li, Jiaxing

AU - Zhang, Qianru

AU - Wu, Liankui

AU - Cao, Fahe

AU - Zhang, Shuyan

AU - Yang, Tao

AU - Sun, Qingqing

PY - 2025/4/10

Y1 - 2025/4/10

N2 - The Al-1.5Mn alloy with a gradient microstructure was fabricated by ultrasonic shot peening (USSP). Surface grain size is refined to as small as 150 nm and the depth of USSP affected zone extending approximately 500 μm. Al6Mn precipitates in the surface layer partially dissolved into Al matrix. USSP significantly improves the surface hardness, yield strength and tensile strength while maintaining an excellent plasticity. Besides strength-plasticity synergy, strength-corrosion resistance synergy was also achieved by this gradient design. The gradient Al-1.5Mn alloy forms a thinner passive film. Enhanced corrosion resistance is primarily attributed to microstructural changes, instead of the residual stress change. © 2025 Elsevier B.V.

AB - The Al-1.5Mn alloy with a gradient microstructure was fabricated by ultrasonic shot peening (USSP). Surface grain size is refined to as small as 150 nm and the depth of USSP affected zone extending approximately 500 μm. Al6Mn precipitates in the surface layer partially dissolved into Al matrix. USSP significantly improves the surface hardness, yield strength and tensile strength while maintaining an excellent plasticity. Besides strength-plasticity synergy, strength-corrosion resistance synergy was also achieved by this gradient design. The gradient Al-1.5Mn alloy forms a thinner passive film. Enhanced corrosion resistance is primarily attributed to microstructural changes, instead of the residual stress change. © 2025 Elsevier B.V.

KW - Al-Mn Alloy

KW - Corrosion

KW - Gradient structure

KW - Strength-plasticity synergy

UR - https://www.scopus.com/pages/publications/105000427840

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105000427840&origin=recordpage

U2 - 10.1016/j.jallcom.2025.179838

DO - 10.1016/j.jallcom.2025.179838

M3 - RGC 21 - Publication in refereed journal

SN - 0925-8388

VL - 1022

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 179838

ER -

Microstructure of gradient Al-1.5Mn alloy and its influence on mechanical response and corrosion behavior

Abstract

Research Keywords

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