Cu strengthened Al-Si-Cu semi-solid billet fabricated by liquid phase reaction sintering

Wenchao Liu; Yu Sun; Cheng Deng; Lianxi Hu; Shangjing Yuan; Jingyuan Shen; Fei Gao; Meiyi Ba

doi:10.1016/j.matchar.2022.111925

Cu strengthened Al-Si-Cu semi-solid billet fabricated by liquid phase reaction sintering

Wenchao Liu
, Yu Sun^*
, Cheng Deng
, Lianxi Hu
, Shangjing Yuan
, Jingyuan Shen
, Fei Gao
, Meiyi Ba

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Harbin Institute of Technology
South China University of Technology
Taiyuan University of Technology

Research output: Contribution to journal › Review article › peer-review

7 Scopus citations

Abstract

A high-strength Al-6Si-6Cu semi-solid billet was prepared by liquid phase reaction sintering. Compared with the pure Al grains in the Al-6Si (wt%) semi-solid billet, Cu nanoparticles precipitated in Al grains of the Al-6Si-6Cu (wt%) semi-solid billet. The interface modified by geometrically necessary dislocations (GNDs) makes Cu nanoparticles show a strong pinning effect on dislocations. Under this pinning action, the Al-6Si-6Cu semi-solid billet possesses an outstanding strain-hardening rate, and its yield strength (YS) and ultimate strength (US) increased by 120% and 67.4%, reaching 220 MPa and 360 MPa respectively. The analysis of strengthening mechanism suggests that Orowan strengthening provided by Cu nanoparticles is the main strengthening mechanism of Al-6Si-6Cu semi-solid billet, which provides 83% of the total yield strength.

Original language	English
Article number	111925
Journal	Materials Characterization
Volume	188
DOIs	https://doi.org/10.1016/j.matchar.2022.111925
State	Published - Jun 2022

Keywords

Cu nanoparticles
Liquid phase reaction sintering
Mechanical property
Strengthening mechanism

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10.1016/j.matchar.2022.111925

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@article{2faf5d393234456d8bb40790498c949b,

title = "Cu strengthened Al-Si-Cu semi-solid billet fabricated by liquid phase reaction sintering",

abstract = "A high-strength Al-6Si-6Cu semi-solid billet was prepared by liquid phase reaction sintering. Compared with the pure Al grains in the Al-6Si (wt\%) semi-solid billet, Cu nanoparticles precipitated in Al grains of the Al-6Si-6Cu (wt\%) semi-solid billet. The interface modified by geometrically necessary dislocations (GNDs) makes Cu nanoparticles show a strong pinning effect on dislocations. Under this pinning action, the Al-6Si-6Cu semi-solid billet possesses an outstanding strain-hardening rate, and its yield strength (YS) and ultimate strength (US) increased by 120\% and 67.4\%, reaching 220 MPa and 360 MPa respectively. The analysis of strengthening mechanism suggests that Orowan strengthening provided by Cu nanoparticles is the main strengthening mechanism of Al-6Si-6Cu semi-solid billet, which provides 83\% of the total yield strength.",

keywords = "Cu nanoparticles, Liquid phase reaction sintering, Mechanical property, Strengthening mechanism",

author = "Wenchao Liu and Yu Sun and Cheng Deng and Lianxi Hu and Shangjing Yuan and Jingyuan Shen and Fei Gao and Meiyi Ba",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = jun,

doi = "10.1016/j.matchar.2022.111925",

language = "英语",

volume = "188",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Cu strengthened Al-Si-Cu semi-solid billet fabricated by liquid phase reaction sintering

AU - Liu, Wenchao

AU - Sun, Yu

AU - Deng, Cheng

AU - Hu, Lianxi

AU - Yuan, Shangjing

AU - Shen, Jingyuan

AU - Gao, Fei

AU - Ba, Meiyi

PY - 2022/6

Y1 - 2022/6

N2 - A high-strength Al-6Si-6Cu semi-solid billet was prepared by liquid phase reaction sintering. Compared with the pure Al grains in the Al-6Si (wt%) semi-solid billet, Cu nanoparticles precipitated in Al grains of the Al-6Si-6Cu (wt%) semi-solid billet. The interface modified by geometrically necessary dislocations (GNDs) makes Cu nanoparticles show a strong pinning effect on dislocations. Under this pinning action, the Al-6Si-6Cu semi-solid billet possesses an outstanding strain-hardening rate, and its yield strength (YS) and ultimate strength (US) increased by 120% and 67.4%, reaching 220 MPa and 360 MPa respectively. The analysis of strengthening mechanism suggests that Orowan strengthening provided by Cu nanoparticles is the main strengthening mechanism of Al-6Si-6Cu semi-solid billet, which provides 83% of the total yield strength.

AB - A high-strength Al-6Si-6Cu semi-solid billet was prepared by liquid phase reaction sintering. Compared with the pure Al grains in the Al-6Si (wt%) semi-solid billet, Cu nanoparticles precipitated in Al grains of the Al-6Si-6Cu (wt%) semi-solid billet. The interface modified by geometrically necessary dislocations (GNDs) makes Cu nanoparticles show a strong pinning effect on dislocations. Under this pinning action, the Al-6Si-6Cu semi-solid billet possesses an outstanding strain-hardening rate, and its yield strength (YS) and ultimate strength (US) increased by 120% and 67.4%, reaching 220 MPa and 360 MPa respectively. The analysis of strengthening mechanism suggests that Orowan strengthening provided by Cu nanoparticles is the main strengthening mechanism of Al-6Si-6Cu semi-solid billet, which provides 83% of the total yield strength.

KW - Cu nanoparticles

KW - Liquid phase reaction sintering

KW - Mechanical property

KW - Strengthening mechanism

UR - https://www.scopus.com/pages/publications/85129023504

U2 - 10.1016/j.matchar.2022.111925

DO - 10.1016/j.matchar.2022.111925

M3 - 文献综述

AN - SCOPUS:85129023504

SN - 1044-5803

VL - 188

JO - Materials Characterization

JF - Materials Characterization

M1 - 111925

ER -

Cu strengthened Al-Si-Cu semi-solid billet fabricated by liquid phase reaction sintering

Abstract

Keywords

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