Al-5Ti-0.25C-0.25B和Al-5Ti-1B中间合金对Al-9.5Si-1.5Cu-0.8Mn-0.6Mg合金微观组织和力学性能的影响

Effect of Al-5Ti-0.25C-0.25B and Al-5Ti-1B Master Alloys on the Microstructure and Mechanical Properties of Al-9.5Si-1.5Cu-0.8Mn-0.6Mg Alloy.

作者信息

Wen Yihan, Wu Yuying, Wu Yongjie, Gao Tong, Wei Zuoshan, Liu Xiangfa

机构信息

Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China.

Shandong Key Laboratory of Advanced Aluminum Materials and Technology, Binzhou Institute of Technology, Binzhou 256600, China.

出版信息

Materials (Basel). 2023 Feb 1;16(3):1246. doi: 10.3390/ma16031246.

DOI:10.3390/ma16031246

PMID:36770252

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9919973/

Abstract

The goal of this research was to determine how the master alloys Al-5Ti-0.25C-0.25B and Al-5Ti-1B affected the mechanical properties and structural characteristics of the alloy Al-9.5Si-1.5Cu-0.8Mn-0.6Mg. Field emission scanning electron microscopy (FE-SEM) was used to probe the microscopic composition, and the mechanical properties were evaluated using tensile testing. The results showed that, by adding 0.5% Al-5Ti-0.25C-0.25B master alloy and 0.5% Al-5Ti-1B master alloy, the α-Al dendrites can be significantly refined. In the extrusion state, the ultimate tensile strength and elongation with 0.5% Al-5Ti-0.25C-0.25B master alloy reached 380 MPa and 11.2%, which were 5.5% and 22.4% higher than no refinement, respectively. The elongation of the samples with the Al-5Ti-1B alloy addition increased from 9% to 11.9%, which is attributed to the fact that more pronounced complete recrystallization occurred during the extrusion heat treatment.

摘要

本研究的目的是确定中间合金Al-5Ti-0.25C-0.25B和Al-5Ti-1B如何影响合金Al-9.5Si-1.5Cu-0.8Mn-0.6Mg的力学性能和组织特征。采用场发射扫描电子显微镜（FE-SEM）探测微观成分，并通过拉伸试验评估力学性能。结果表明，添加0.5%的Al-5Ti-0.25C-0.25B中间合金和0.5%的Al-5Ti-1B中间合金，可以显著细化α-Al枝晶。在挤压状态下，添加0.5%的Al-5Ti-0.25C-0.25B中间合金时的抗拉强度和伸长率分别达到380MPa和11.2%，比未细化时分别提高了5.5%和22.4%。添加Al-5Ti-1B合金的样品伸长率从9%提高到11.9%，这归因于在挤压热处理过程中发生了更明显的完全再结晶。