Effect of Composition on Crack Susceptibility Index of Al-Si and Al-Si-Mg Alloys
College of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China
| Abstract: | In order to reasonably design the composition of Al-Si based alloy and study the effect of alloying elements on hot crck of Al-Si based alloys, the effect of alloying elements on hot cracking of Al-Si based alloy was studied. The influence of different Si contents on the crack susceptibility index (CSI) of Al-Si alloy was calculated by using Pandat, and the influence of Mg addition on the CSI of the Al-Si-Mg alloy was also calculated. The solidification path affecting the CSI of the alloy was analyzed. The results show that when the Si content is below 10% (mass percentage), the CSI is almost non-existent and the Al-Si alloy will not show crack tendency; When the Si content reaches 11~12%, the CSI of the Al-Si alloy is very small. When the Si content reaches the hypereutectic region (Si ≥ 13%), the CSI of the Al-Si alloy begin to increase with increasing of Si content. The crack tendency of the Al-Si alloy in the hypereutectic region is larger. Adding Mg can effectively reduce the CSI of the alloy. Furthermore, with increasing of Mg content, the CSI of Al-Si-Mg alloy gradually decreases. |
| Keywords: | Al-Si Alloy; Al-Si-Mg Alloy; Crack Susceptibility Index; Composition; Solidification |
| DOI: | 10.57237/j.mater.2022.02.005 |
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Received: 28 November 2022
Accepted: 16 January 2023
Published Online: 3 February 2023
References
| [1] | Birol Y. Melt treatment of Al-Si foundry alloy with B and Sr additions [J]. Journal of Materials Science, 2017, 52 (11): 6856-6865. |
| [2] | Stadler F, Antrekowitsch H, Fragner W, et al. Effect of main alloying elements on strength of Al-Si foundry alloys at elevated temperatures [J]. International Journal of Cast Metals Research, 2012, 25 (4): 215-224. |
| [3] | Ye H. An overview of the development of Al-Si-Alloy based material for engine applications [J]. Journal of Materials Engineering & Performance, 2003, 12: 288-297. |
| [4] | Gan J Q, Huang Y J, Wen C, et al. Effect of Sr modification on microstructure and thermal conductivity of hypoeutectic Al-Si alloys [J]. Transactions of Nonferrous Metals Society of China, 2020, 30 (11): 2879-2890. |
| [5] | Olivier C, Yvan C, Michel B. Hot tearing in steels during solidification: experimental characterization and thermome-chanical modeling [J]. Journal of Engineering Materials and Technology, 2008, 130 (2): 1-7. |
| [6] | Bellet M, Cerri O, Bobadilla M, et al. Modeling hot tearing during solidification of steels: assessment and improvement of macroscopic criteria through the analysis of two experimental tests [J]. Metallurgical and Materials Transactions A, 2009, 40 (11):2705-2717. |
| [7] | Li S, Apelian D. Hot tearing of aluminum alloys a critical literature review [J]. International Journal of Metalcasting, 2011, 5 (1): 23-40. |
| [8] | Li Y, Li H, Katgerman L, et al. Recent advances in hot tearing during casting of aluminium alloys [J]. Progress in Materials Science, 2021, 117:100741. |
| [9] | Sun Z, Tan X, Wang C, et al. Reducing hot tearing by grain boundary segregation engineering in additive manufacturing: example of an AlxCoCrFeNi high-entropy alloy [J]. Acta Materialia, 2021, 204: 116505. |
| [10] | Song J F, Pan F S, Jiang B, et al. A review on hot tearing of magnesium alloys [J]. Journal of Magnesium and Alloys, 2016, 4 (3): 151-172. |
| [11] | Clyne T W, Davies G J. The influence of composition on solidification cracking susceptibility in binary alloy system [J]. The British Foundryman, 1981, 74: 65-73. |
| [12] | Monroe C A, Beckermann C. Development of a hot tear indicator for steel castings [J]. Materials Science and Engineering A, 2005, 413:30-36. |
| [13] | Kou S. A criterion for cracking during solidification [J]. Acta Materialia, 2015, 88:366-374. |
| [14] | Liu J, Kou S. Susceptibility of ternary aluminum alloys to cracking during solidification [J]. Acta Materialia, 2017, 125: 513-523. |
| [15] | Lang G. The relation between pahase diagram and fluidity [J]. Aluminum, 1972, 48: 664-672. |
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