热处理对近共晶铝-镍-锰合金微观结构的影响以及机械和热电特性的测定

IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Express Pub Date : 2024-08-06 DOI:10.1088/2053-1591/ad6958
Yusuf Kaygısız
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引用次数: 0

摘要

本研究探讨了固溶热处理对铝-镍-锰近共晶合金的微观结构、机械特性、热物理性能和电阻率的影响。研究的重点是不同的温度和保温时间。铝-镍-锰近共晶合金体系的成分选择为 Al-5.3%Ni-1.0%Mn(重量比)。在未经热处理的样品中,基体相(α-Al)与金属间相 Al9(Mn,Ni)2 和 Al3Ni 相处于平衡状态。在 570 °C 下进行 2 小时固溶热处理,然后在 180 °C 下进行 8 小时人工时效处理后,未经热处理样品的硬度值(49.8 kg mm-2)增至 70.1 kg mm-2。硬度值提高了约 41%。未热处理样品的 TE:651.81 °C,热处理样品的 TE:648.79 °C。熔化焓 (ΔH)值的测定结果为:未经过热处理的样品为 336.79 (J g-1),经过热处理的样品为 516.36 (J g-1)。未经过热处理的样品的热容量(Cpl)值为 0.364 J g-1.K,经过热处理的样品的热容量(Cpl)值为 0.560 J g-1.K。在 600 °C 下,经过 2 小时溶液热处理的样品的电阻率值达到了最高值。
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Effect of heat treatment on microstructure of near-eutectic Al-Ni-Mn alloy, and determination of mechanical and thermoelectrical properties
This study examined the impact of solution heat treatment on the microstructure, mechanical characteristics, thermophysical properties, and electrical resistivity of an Al-Ni-Mn near-eutectic alloy. The investigation focused on varying temperatures and holding periods. The composition of the Al-Ni-Mn near-eutectic alloy system was chosen as Al-5.3%Ni-1.0%Mn (wt). In the non-heat-treated sample, the matrix phase (α-Al) is in equilibrium with the intermetallic Al9(Mn,Ni)2 and Al3Ni phases. The hardness value of the non-heat-treated sample (49.8 kg mm−2) increased to 70.1 kg mm−2 with 2 h of solution heat treatment at 570 °C and then 8 h of artificial aging at 180 °C. The hardness value increased by approximately 41%. TE: 651.81 °C for the non-heat-treated sample and TE:648.79 °C for the heat-treated sample. Fusion enthalpy (ΔH) value was determined as 336.79 (J g−1) for the non-heat-treated sample and 516.36 (J g−1) for the heat-treated sample. Heat Capacity (Cpl) value was found to be 0.364 J g−1.K for the non-heat-treated sample and 0.560 J g−1.K for the heat-treated sample. The electrical resistivity value of the 2 h’ solution heat-treated sample at 600 °C reached its highest value.
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来源期刊
Materials Research Express
Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
4.50
自引率
4.30%
发文量
640
审稿时长
12 weeks
期刊介绍: A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.
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