Pitting of 2024 alloys prepared by spark plasma sintering using powders with different sizes

Yanbing Meng; Songmei Li; Jianhua Liu; Mei Yu; Wenming Tian; Mengjia Chen

doi:10.1016/j.corsci.2020.108525

Pitting of 2024 alloys prepared by spark plasma sintering using powders with different sizes

Yanbing Meng
, Songmei Li^*
, Jianhua Liu
, Mei Yu
, Wenming Tian
, Mengjia Chen

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University
North China Institute of Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Correlation in microstructures of bulks and powders, pitting resistance and grain sizes for spark plasma sintered 2024 aluminum alloys has been studied. Results reveal the microstructures of bulk are resemble to powders. While the average grain sizes of bulks, which increase with raising powder size, are much smaller due to recrystallization. Corrosion in electrochemical tests increase with increasing grain size, suggesting a decreasing pitting resistance. Microscopy observation indicates pits initiate at intermetallic particles and the biggest depths range from 3.2 to 24.7 μm for A5 and A80. Mechanism analysis proves the stronger passivity of fine-grained samples enhances the corrosion resistance.

Original language	English
Article number	108525
Journal	Corrosion Science
Volume	170
DOIs	https://doi.org/10.1016/j.corsci.2020.108525
State	Published - 1 Jul 2020

Keywords

2024 alloys
Grain size
Pitting resistance
Spark plasma sintering

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10.1016/j.corsci.2020.108525

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title = "Pitting of 2024 alloys prepared by spark plasma sintering using powders with different sizes",

abstract = "Correlation in microstructures of bulks and powders, pitting resistance and grain sizes for spark plasma sintered 2024 aluminum alloys has been studied. Results reveal the microstructures of bulk are resemble to powders. While the average grain sizes of bulks, which increase with raising powder size, are much smaller due to recrystallization. Corrosion in electrochemical tests increase with increasing grain size, suggesting a decreasing pitting resistance. Microscopy observation indicates pits initiate at intermetallic particles and the biggest depths range from 3.2 to 24.7 μm for A5 and A80. Mechanism analysis proves the stronger passivity of fine-grained samples enhances the corrosion resistance.",

keywords = "2024 alloys, Grain size, Pitting resistance, Spark plasma sintering",

author = "Yanbing Meng and Songmei Li and Jianhua Liu and Mei Yu and Wenming Tian and Mengjia Chen",

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T1 - Pitting of 2024 alloys prepared by spark plasma sintering using powders with different sizes

AU - Meng, Yanbing

AU - Li, Songmei

AU - Liu, Jianhua

AU - Yu, Mei

AU - Tian, Wenming

AU - Chen, Mengjia

PY - 2020/7/1

Y1 - 2020/7/1

N2 - Correlation in microstructures of bulks and powders, pitting resistance and grain sizes for spark plasma sintered 2024 aluminum alloys has been studied. Results reveal the microstructures of bulk are resemble to powders. While the average grain sizes of bulks, which increase with raising powder size, are much smaller due to recrystallization. Corrosion in electrochemical tests increase with increasing grain size, suggesting a decreasing pitting resistance. Microscopy observation indicates pits initiate at intermetallic particles and the biggest depths range from 3.2 to 24.7 μm for A5 and A80. Mechanism analysis proves the stronger passivity of fine-grained samples enhances the corrosion resistance.

AB - Correlation in microstructures of bulks and powders, pitting resistance and grain sizes for spark plasma sintered 2024 aluminum alloys has been studied. Results reveal the microstructures of bulk are resemble to powders. While the average grain sizes of bulks, which increase with raising powder size, are much smaller due to recrystallization. Corrosion in electrochemical tests increase with increasing grain size, suggesting a decreasing pitting resistance. Microscopy observation indicates pits initiate at intermetallic particles and the biggest depths range from 3.2 to 24.7 μm for A5 and A80. Mechanism analysis proves the stronger passivity of fine-grained samples enhances the corrosion resistance.

KW - 2024 alloys

KW - Grain size

KW - Pitting resistance

KW - Spark plasma sintering

UR - https://www.scopus.com/pages/publications/85079840109

U2 - 10.1016/j.corsci.2020.108525

DO - 10.1016/j.corsci.2020.108525

M3 - 文章

AN - SCOPUS:85079840109

SN - 0010-938X

VL - 170

JO - Corrosion Science

JF - Corrosion Science

M1 - 108525

ER -

Pitting of 2024 alloys prepared by spark plasma sintering using powders with different sizes

Abstract

Keywords

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