Justus Uchenna Anaele, Kenneth Kanayo Alaneme, Joseph Ajibade Omotoyinbo
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引用次数: 0
摘要
研究了热处理对A、B、C三类Cu-Zn-Sn-Fe sma磨损和腐蚀行为的影响。用摩擦计研究了其磨损性能，用动电位极化法研究了其在0.3 M h2so4和3.5%NaCl介质中的腐蚀性能。合金组织主要由FCC富Cu相和cu5zn8相组成。上淬后的A合金硬度最高，磨损率最低，分别为72.1 HRB和0.143 mm 3 /N/m。直接淬火试样的平均COF(0.35 ~ 0.12)高于上淬火试样(0.16 ~ 0.12)和阶梯淬火试样(0.2 ~ 0.08)。磨损是由磨损和粘附的混合模式机制发生的，表面上有明显的凹槽和磨损颗粒。在0.3 M h2so4介质中，阶梯淬火合金的腐蚀速率为0.1022 ~ 1.1705 mm/yr，低于直接淬火试样的腐蚀速率0.1466 ~ 0.2855 mm/yr和直接淬火试样的腐蚀速率0.1730 ~ 0.6027 mm/yr。在3.5% NaCl溶液中，阶梯淬火合金的腐蚀速率最低，为0.0251 mm/yr。一般来说，阶梯淬火处理有效地提高了合金在两种介质中的耐蚀性。
Wear and corrosion behavior of selected up-quenched and step-quenched CuZnSn shape memory alloys
The effect of thermal treatment on the wear and corrosion behavior of three categories of Cu-Zn-Sn-Fe SMAs designated A, B, and C is studied. Wear properties were investigated using a tribometer whilst corrosion in 0.3 M H 2 SO 4 and 3.5%NaCl media was studied using the potentiodynamic polarization method. The microstructure of the alloys mainly consists of FCC Cu-rich phase and Cu 5 Zn 8 phase. The up-quenched A alloys show the highest hardness and lowest wear rate values of 72.1 HRB and 0.143 mm 3 /N/m respectively. Average COF was higher for the samples subjected to direct-quenching (0.35–0.12) than the up-quenched (0.16–0.12) and step-quenched (0.2–0.08) samples. Wear occurred by mixed mode mechanisms of abrasion and adhesion evident by grooves and wear particles on the surface. In 0.3 M H 2 SO 4 medium, step-quenched alloys had corrosion rates in the range of 0.1022 to 1.1705 mm/yr, which is lower than the range of 0.1466 to 0.2855 mm/yr, and 0.1730 to 0.6027 mm/yr obtained for direct quenched and up-quenched samples respectively. In 3.5% NaCl solution, step-quenched alloys had the lowest corrosion rates 0.0251 mm/yr relative to samples subjected to up-quenching and direct quenching treatment. Generally, step-quenching treatment effectively improved the corrosion resistance of alloys in both media.
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The aim of the journal is to stimulate and record an international forum for disseminating knowledge on the advances, developments and applications of manufacturing engineering, technology and applied sciences with a focus on critical reviews of developments in manufacturing and emerging trends in this field. The journal intends to establish a specific focus on reviews of developments of key core topics and on the emerging technologies concerning manufacturing engineering, technology and applied sciences, the aim of which is to provide readers with rapid and easy access to definitive and authoritative knowledge and research-backed opinions on future developments. The scope includes, but is not limited to critical reviews and outstanding original research papers on the advances, developments and applications of: Materials for advanced manufacturing (Metals, Polymers, Glass, Ceramics, Composites, Nano-materials, etc.) and recycling, Material processing methods and technology (Machining, Forming/Shaping, Casting, Powder Metallurgy, Laser technology, Joining, etc.), Additive/rapid manufacturing methods and technology, Tooling and surface-engineering technology (fabrication, coating, heat treatment, etc.), Micro-manufacturing methods and technology, Nano-manufacturing methods and technology, Advanced metrology, instrumentation, quality assurance, testing and inspection, Mechatronics for manufacturing automation, Manufacturing machinery and manufacturing systems, Process chain integration and manufacturing platforms, Sustainable manufacturing and Life-cycle analysis, Industry case studies involving applications of the state-of-the-art manufacturing methods, technology and systems. Content will include invited reviews, original research articles, and invited special topic contributions.
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