TY - JOUR

T1 - Microstructure Evolution and Mechanical Properties at Ambient and Elevated Temperatures of in-situ TiB2/2219Al Matrix Composites During Cold Rolling

AU - Li, Linwei

AU - Zhou, Donghu

AU - Wei, Chengbin

AU - Han, Zhenhao

AU - LI, Jiehua

AU - Kang, Huijun

AU - Guo, Enyu

AU - Zhang, Yubo

AU - Chen, Zongning

AU - Wang, Tongmin

N1 - Publisher Copyright: © The Author(s) under exclusive licence to The Korean Institute of Metals and Materials 2024.

PY - 2024/5/7

Y1 - 2024/5/7

N2 - Cold rolling is one of the feasible and effective methods for regulating the microstructure and enhancing the mechanical properties of metallic materials. However, the cold rolling of particulate-reinforced aluminum matrix composites has been rarely studied comprehensively and systematically due to their limited plasticity. In this study, in-situ TiB 2/2219Al matrix composites with a comparable ductility to 2219Al matrix were prepared and subjected to T3 treatment, which includes solution treatment, cold rolling, and natural ageing, with varying degrees of rolling reduction. The effects of cold rolling on the dislocation multiplication, grain and texture evolution, precipitation behavior, and mechanical properties were comprehensively investigated and discussed. The results reveal that both total dislocation density and geometrically necessary dislocation density increase with increasing rolling reduction. The average grain size progressively decreases under the joint influence of gradual growth of large grains and increase of small grains. Besides, rolling deformation changes the ageing behavior of composites, resulting in a decrease in precipitation temperature for both θ″ and θ′ phases. Under a large deformation, these phases precipitate at room temperature. Moreover, the types and proportions of textures undergoes a distinct evolution during deformation, with S, Copper and Brass textures being predominantly observed in the composite subjected to a 60% rolling reduction. Additionally, the increase in deformation results in an enhanced hardness and strength at both room temperature and 373 K. However, the strength initially increases but subsequently decreases at 573 K, and the composite with a 20% rolling reduction exhibits the highest strength at 573 K. Graphical Abstract: (Figure presented.).

AB - Cold rolling is one of the feasible and effective methods for regulating the microstructure and enhancing the mechanical properties of metallic materials. However, the cold rolling of particulate-reinforced aluminum matrix composites has been rarely studied comprehensively and systematically due to their limited plasticity. In this study, in-situ TiB 2/2219Al matrix composites with a comparable ductility to 2219Al matrix were prepared and subjected to T3 treatment, which includes solution treatment, cold rolling, and natural ageing, with varying degrees of rolling reduction. The effects of cold rolling on the dislocation multiplication, grain and texture evolution, precipitation behavior, and mechanical properties were comprehensively investigated and discussed. The results reveal that both total dislocation density and geometrically necessary dislocation density increase with increasing rolling reduction. The average grain size progressively decreases under the joint influence of gradual growth of large grains and increase of small grains. Besides, rolling deformation changes the ageing behavior of composites, resulting in a decrease in precipitation temperature for both θ″ and θ′ phases. Under a large deformation, these phases precipitate at room temperature. Moreover, the types and proportions of textures undergoes a distinct evolution during deformation, with S, Copper and Brass textures being predominantly observed in the composite subjected to a 60% rolling reduction. Additionally, the increase in deformation results in an enhanced hardness and strength at both room temperature and 373 K. However, the strength initially increases but subsequently decreases at 573 K, and the composite with a 20% rolling reduction exhibits the highest strength at 573 K. Graphical Abstract: (Figure presented.).

KW - Cold rolling

KW - Mechanical property

KW - Microstructure evolution

KW - Precipitation behavior

KW - Texture evolution

KW - TiB /2219Al matrix composite

UR - http://www.scopus.com/inward/record.url?scp=85192197481&partnerID=8YFLogxK

U2 - 10.1007/s12540-024-01680-2

DO - 10.1007/s12540-024-01680-2

M3 - Article

VL - 30.2024

SP - 2791

EP - 2807

JO - Metals and materials international

JF - Metals and materials international

SN - 2005-4149

IS - 10

ER -