稻壳灰Si2N2O增强AA-7475金属基复合材料干湿滑动、疲劳、蠕变及力学性能

IF 2.1 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS
K. Pratheesh, Seeniappan Kaliappan, L. Natrayan, V. P. Arthanarieswaran
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引用次数: 0

摘要

本研究广泛探讨了稻壳灰热处理Si2N2O增强AA7475金属基复合材料的力学性能。采用搅拌铸造方法精心制作试样,确保Si2N2O颗粒在AA7475基体内均匀分散。这些试件的特性遵循ASTM标准,包括干湿滑动行为、疲劳强度、抗蠕变性能和整体机械性能的评估。在各种各样的标本中,AAR3的命名是最有希望的,展示了卓越的力学性能。AAR3的抗拉强度为569 MPa,延伸率降低了8%,屈服强度为264 MPa,冲击能为24.15 j。由于AAR3中含有6wt%的Si2N2O颗粒,硬度也提高了164。机械强度的提高趋势扩展到疲劳性能,其中AAR2的疲劳强度达到329 MPa。在耐磨性方面,AAR3取得了令人印象深刻的成绩,其比磨损率为0.0075 mm³/Nm,干滑动磨损的摩擦系数(COF)为0.44。对于湿滑动磨损,AAR3的比磨损率为0.0047 mm³/Nm, COF为0.42。在蠕变性能方面,AAR3在2000、4000、6000、8000和10000 s时间间隔内的蠕变应变减小值分别为0.01824、0.0233、0.0934、0.2004和0.3505。这些发现共同强调了AAR3优越的力学和摩擦学性能,强调了热处理Si2N2O增强材料在提高AA7475金属基复合材料性能方面的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dry and wet sliding, fatigue, creep and mechanical properties of AA-7475 metal matrix composite reinforced with Si2N2O from rice husk ash

This study extensively explores the mechanical performance of AA7475 metal matrix composites reinforced with heat-treated Si2N2O sourced from rice husk ash. The specimens were meticulously fabricated using the stir casting method, ensuring a homogeneous dispersion of Si2N2O particles within the AA7475 matrix. The characterization of these specimens followed ASTM standards, encompassing evaluations of dry and wet sliding behavior, fatigue strength, creep resistance, and overall mechanical properties.Among the various specimens, the AAR3 designation emerged as the most promising, showcasing exceptional mechanical properties. AAR3 exhibited a remarkable tensile strength of 569 MPa, accompanied by a reduced elongation of 8%, yield strength of 264 MPa, and impact energy of 24.15 J. The increased rigidity attributed to the 6wt% Si2N2O particles in AAR3 also led to an improved hardness of 164.The trend of enhanced mechanical strength extended to fatigue properties, with AAR2 delivering a notable fatigue strength of 329 MPa. In terms of wear resistance, AAR3 stood out with impressive results, featuring a specific wear rate of 0.0075 mm³/Nm and a coefficient of friction (COF) of 0.44 for dry sliding wear. For wet sliding wear, AAR3 demonstrated a specific wear rate of 0.0047 mm³/Nm and a COF of 0.42.In the realm of creep properties, AAR3 exhibited reduced creep strain values of 0.01824, 0.0233, 0.0934, 0.2004, and 0.3505 for time intervals of 2000, 4000, 6000, 8000, and 10,000 s, respectively. These findings collectively emphasize the superior mechanical and tribological performance of AAR3, underlining the potential of heat-treated Si2N2O reinforcement for enhancing the properties of AA7475 metal matrix composites.

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来源期刊
Journal of the Australian Ceramic Society
Journal of the Australian Ceramic Society Materials Science-Materials Chemistry
CiteScore
3.70
自引率
5.30%
发文量
123
期刊介绍: Publishes high quality research and technical papers in all areas of ceramic and related materials Spans the broad and growing fields of ceramic technology, material science and bioceramics Chronicles new advances in ceramic materials, manufacturing processes and applications Journal of the Australian Ceramic Society since 1965 Professional language editing service is available through our affiliates Nature Research Editing Service and American Journal Experts at the author''s cost and does not guarantee that the manuscript will be reviewed or accepted
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