Microstructure features and mechanical properties of non-heat treated HPDC Al9Si0.6Mn–TiB2 alloys

Chengyang Hu; Hongyi Zhu; Yihao Wang; Cunjuan Xia; Jiwei Geng; Dong Chen; Huawei Zhang; Mingliang Wang; Haowei Wang

Journal of Materials Research and Technology (Nov 2023)

Microstructure features and mechanical properties of non-heat treated HPDC Al9Si0.6Mn–TiB2 alloys

Chengyang Hu,
Hongyi Zhu,
Yihao Wang,
Cunjuan Xia,
Jiwei Geng,
Dong Chen,
Huawei Zhang,
Mingliang Wang,
Haowei Wang

Affiliations

Chengyang Hu: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Hongyi Zhu: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Yihao Wang: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Cunjuan Xia: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei 235000, China; School of Physics and Electronic Information College, Huaibei Normal University, Huaibei, Anhui 235000 China
Jiwei Geng: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei 235000, China
Dong Chen: Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei 235000, China; School of Physics and Electronic Information College, Huaibei Normal University, Huaibei, Anhui 235000 China
Huawei Zhang: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding author. Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei 235000, China.
Mingliang Wang: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei 235000, China; School of Physics and Electronic Information College, Huaibei Normal University, Huaibei, Anhui 235000 China; Corresponding author. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.
Haowei Wang: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Alumics Materials, Shanghai Jiao Tong University (Anhui), Huaibei 235000, China; School of Physics and Electronic Information College, Huaibei Normal University, Huaibei, Anhui 235000 China

Journal volume & issue: Vol. 27
pp. 2117 – 2131

Abstract

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This study aimed to enhance the mechanical properties of high pressure die casting (HPDC) Al9Si0.6Mn alloys by incorporating in-situ TiB2 particles. The effects of TiB2 addition on the microstructure and mechanical properties of as-HPDC Al9Si0.6Mn alloys were investigated. The results showed that TiB2 addition refined the bimodal grain structure and eutectic Si morphology in the central region of the as-HPDC alloys, which was the primary contributor to the mechanical properties. The thickness of the skin region and band zone increased with increasing TiB2 addition, while the central region exhibited a reduced thickness but remained dominant on the entire cross-section. The optimal TiB2 content was found to be 1 wt%, resulting in the 23.4 % reduction in grain size and 10.7 % enhancement in yield strength. The modified strengthening model based on the microstructure features of the central region accurately predicted the yield strengths of as-HPDC alloys. Finally, the morphological strengthening factors induced by TiB2 particles were analytically illustrated in the HPDC Al9Si0.6Mn–TiB2 alloys.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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