Effects of Ti–B and Si additions on microstructure and mechanical properties of Al–Cu–Mg based aluminum matrix composites

Kim, Insu; Song, MinYoung; Kim, Jae Hwang

doi:10.1016/j.jallcom.2020.154827

Cited by 11 publications

(5 citation statements)

References 25 publications

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“…The mechanism of hardening on account of increase in the wt.% Cu can be linked to increase in particle hardening effect, considering that Cu is harder than Al-Zn alloy [14,22]. Furthermore, increase in both direct and indirect strengthening due to both load transfer phenomenon and dislocation generated due to difference in thermal coefficient of expansion during solidification, have been mentioned in literature to be contributory factors to improved hardening in particle reinforced composites [12,35].…”

Section: Mechanical Properties 331 Hardness Propertiesmentioning

confidence: 99%

Structural analysis, mechanical and damping behaviour of Al-Zn based composites reinforced with Cu and SiC particles

2022

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The structural characteristics, mechanical and damping properties of stir-cast Al-10 wt.% Zn based composites developed using 6 and 8 wt.% Cu, and 8 wt.% SiC particles as reinforcements, were investigated. The low porosity (<4%), near absence of dissolved Cu in the Al-Zn matrix, and marginal presence of melt reaction-induced intermetallic phases, attest to the soundness of the castings. Besides hardness, the strength parameters − ultimate tensile strength (149.33 MPa and 138.64 MPa) and specific strength (54.3 MPa cm3 g−1 and 51.16 MPa cm3 g−1) − of the Al-Zn composites reinforced with 6 and 8 wt.% Cu, were superior to that of the unreinforced Al-Zn alloy (103.47 MPa) and the 8 wt.% SiC reinforced composite (130.5 MPa). The fracture toughness (17.32 MPa m1/2 and 13.66 MPa m1/2) and percentage elongation (15% and 12.5%) of the 6 and 8 wt.% Cu reinforced Al-Zn composites, also surpassed that reinforced with SiC (KIC − 12.28 MPa m1/2; % εf − 9.5%). Improved matrix/particles interphase bonding and the inherent ductile and tough nature of Cu over SiC, were cited responsible for the improved strength-ductility-toughness balance of the Al-Zn/Cu composites over that reinforced with SiC. The damping properties were generally temperature sensitive, with all compositions exhibiting increase in damping capacity at test temperatures 100–200 °C.

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Section: Mechanical Properties 331 Hardness Propertiesmentioning

confidence: 99%

Structural analysis, mechanical and damping behaviour of Al-Zn based composites reinforced with Cu and SiC particles

2022

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“…Hence, there is room for improvement in the current commercial AA6201 and AA6101 alloy series. The precipitation sequence of Al-Mg-Si alloys is usually considered as [7][8][9][10] SSSS ! atomic clusters !…”

Section: Introductionmentioning

confidence: 99%

“…Hence, there is room for improvement in the current commercial AA6201 and AA6101 alloy series. The precipitation sequence of Al–Mg–Si alloys is usually considered as [ 7–10 ]

\text{SSSS} \rightarrow \text{ atomic clusters} \rightarrow \text{ GP zones } \rightarrow \text{ &amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;beta;&amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;aposx;&amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;aposx; } \rightarrow / \text{ U} 1 , \text{ U} 2 , \textrm{ } B &amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;aposx; , \text{ &amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;beta;&amp;#x00026;amp;amp;amp;amp;amp;amp;amp;amp;aposx;} \rightarrow \textrm{ } \beta , \text{ Si }

…”

Section: Introductionmentioning

confidence: 99%

Superior Strength and Electrical Conductivity Synergy of Cold‐Drawn Al–Mg–Si–Ce–Cu Wires Produced by Continuous Casting and Rolling

Niu,

Wang,

Mao

2024

Adv Eng Mater

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Al‐Mg‐Si aluminum wires for overhead power transmission have extensive applications in industry and daily life. In this study, superior strength and electrical conductivity combination in the aged cold‐drawn Al‐Mg‐Si‐Ce‐Cu wires fabricated by continuous casting and rolling are achieved. The cold‐drawn wires exhibit high strength and electrical conductivity combinations of 383±2 MPa, 51.16±0.23% IACS; 373±3 MPa, 51.98±0.25% and 357±3 MPa, 53.16±0.11% IACS, respectively, when aged at 160 °C, 170 °C or 180 °C for 24 h. Subgrain boundaries are introduced into alloys by continuous casting and rolling and cold drawing, causing significant lattice distortion within the grains and providing sites for the nucleation of precipitates. Moreover, HADDF‐STEM (high‐angle annular dark‐field scanning transmission electron microscopy) and DFT (density functional theory) results show that Ce atoms could enter the lattice of β” and replace the Si3 sites, which is energetically preferred. The underlying mechanisms for achieving superior strength‐electrical conductivity combination are to introduce subgrain boundaries via continuous casting and rolling and cold drawing for promoting the transformation of solid solution atoms to finely dispersed precipitates, which significantly reduces the scattering of electrons and hence improves the electrical conductivity. This work provides a new strategy for designing high‐strength and high‐conductivity aluminum alloy wire conductors.This article is protected by copyright. All rights reserved.

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“…Yang et al [11] reviewed the vibration of structures using different tuned mass damper models. Materials with improved noise and vibration performance are a significant area of interest in NVH [12][13][14]. The dynamic behavior of different NVH applications was modeled using nonlinear dynamical systems (SINDy) [15].…”

Section: Introductionmentioning

confidence: 99%

A Modeling Framework to Develop Materials with Improved Noise and Vibration Performance for Electric Vehicles

Mostafavi Yazdi,

Pack,

Rouhollahi

et al. 2023

Energies

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The automotive and aerospace industries increasingly use lightweight materials to improve performance while reducing fuel consumption. Lightweight materials are frequently used in electric vehicles (EVs). However, using these materials can increase airborne and structure-borne noise. Furthermore, EV noise occurs at high frequencies, and conventional materials have small damping. Thus, there is an increasing need for procedures that help design new materials and coatings to reduce the transferred and radiated noise at desired frequencies. This study pioneered new techniques for microstructure modeling of coated and uncoated materials with improved noise, vibration, and harshness (NVH) performance. This work uses the microstructure of materials to study their vibration-damping capacity. Images from an environmental scanning electron microscope (ESEM) show the microstructure of a sample polymer and its coating. Tensile tests and experimental modal analysis were used to obtain the material properties of the polymer for microstructure modeling. The current work investigates how different microstructure parameters, such as fiberglass volume fraction and orientation, can change the vibration performance of materials. The damping ratio in the study was found to be affected by changes in both the direction and volume ratio of fiberglass. Furthermore, the effects of the coating are investigated in this work. Through modal analysis, it was observed that increasing the thickness of aluminum and aluminum bronze coatings caused a rightward shift in resonance frequency. Coatings with a thickness of 2 mm were found to perform better than those with lower thicknesses. Furthermore, the aluminum coating resulted in a greater shift in frequency than the aluminum bronze coating. Additionally, the coating with a higher damping ratio (i.e., aluminum bronze) significantly reduced the amplitude of surface velocity due to excitation, particularly at higher frequencies. This study provides engineers with an understanding of the effects of layer coating on the NVH performance of components and a modeling approach that can be used to design vehicles with enhanced noise and vibration performance.

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Effects of Ti–B and Si additions on microstructure and mechanical properties of Al–Cu–Mg based aluminum matrix composites

Cited by 11 publications

References 25 publications

Structural analysis, mechanical and damping behaviour of Al-Zn based composites reinforced with Cu and SiC particles

Structural analysis, mechanical and damping behaviour of Al-Zn based composites reinforced with Cu and SiC particles

Superior Strength and Electrical Conductivity Synergy of Cold‐Drawn Al–Mg–Si–Ce–Cu Wires Produced by Continuous Casting and Rolling

A Modeling Framework to Develop Materials with Improved Noise and Vibration Performance for Electric Vehicles

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