A novel investigation on the influence of Cu–P modifier on the microstructure, mechanical performance, and melting process of Al–50Si alloys treated by overheating

Cu-14Fe-0.05C alloy was prepared by using the vacuum melting process and then multipass drawing deformation was performed. After that, the alloy in the as-drawn state was annealed. Based on this, the influence of annealing temperature on microstructure, mechanical performance and electrical conductivity of the alloy was studied. The results showed that the speed of recovery and recrystallization of the as-drawn Cu-14Fe-0.05C alloy accelerates and iron-rich fibers gradually become slender, bend and fracture, with the increase of annealing temperature. The tensile strength of the alloy constantly decreases, while elongation continuously rises and resistivity gradually reduces. With the extension of annealing time, tensile strength and resistivity of the Cu-14Fe-0.05C alloy gradually decreases, while elongation gradually increases.

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Innovative Approach to Evaluate the Mechanical Performance of Ti–6Al–4V Lattice Structures Produced by Electron Beam Melting Process

Metals and Materials International ◽

10.1007/s12540-020-00745-2 ◽

2020 ◽

Cited By ~ 2

Author(s):

Giuseppe Del Guercio ◽

Manuela Galati ◽

Abdollah Saboori

Keyword(s):

Electron Beam ◽

Electron Beam Melting ◽

Mechanical Performance ◽

Melting Process ◽

Innovative Approach ◽

Lattice Structures ◽

Electron Beam Melting Process

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271 Cardiac re-synchronization may have a beneficial effect on right ventricular mechanical performance

EP Europace ◽

10.1016/s1099-5129(05)80191-6 ◽

2005 ◽

Vol 7 ◽

pp. 65-65

Keyword(s):

Beneficial Effect ◽

Right Ventricular ◽

Mechanical Performance

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The Mechanical Performance of Carbon Fibres- Addressing the Role of Microstructure

10.33599/nasampe/s.19.1459 ◽

2019 ◽

Author(s):

Peter Peter ◽

Claudia Creighton ◽

David Fox ◽

Pablo Mota Santiago ◽

Adrian Hawley ◽

...

Keyword(s):

Mechanical Performance ◽

Carbon Fibres

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Recovering waste energy of the combined gas turbine system using paraffin melting

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.14.4.2020.15.0589 ◽

2020 ◽

Vol 14 (4) ◽

pp. 7481-7497

Author(s):

Yousef Najjar ◽

Abdelrahman Irbai

Keyword(s):

Melting Process ◽

Payback Period ◽

Energy Utilization ◽

Raw Material ◽

Heat Transfer Fluid ◽

Layered System ◽

Exhaust Gas ◽

Gas Temperature ◽

Power Cycle ◽

Waste Energy

This work covers waste energy utilization of the combined power cycle by using it in the candle raw material (paraffin) melting process and an economic study for this process. After a partial utilization of the burned fuel energy in a real bottoming steam power generation, the exhaust gas contains 0.033 of the initially burned energy. This tail energy with about 128 ºC is partly driven in the heat exchanger of the paraffin melting system. Ansys-Fluent Software was used to study the paraffin wax melting process by using a layered system that utilizes an increased interface area between the heat transfer fluid (HTF) and the phase change material (PCM) to improve the paraffin melting process. The results indicate that using 47.35 kg/s, which is 5% of the entire exhaust gas (881.33 kg/s) from the exit of the combined power cycle, would be enough for producing 1100 tons per month, which corresponds to the production quantity by real candle's factories. Also, 63% of the LPG cost will be saved, and the payback period of the melting system is 2.4 years. Moreover, as the exhaust gas temperature increases, the consumed power and the payback period will decrease.

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Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.3.2020.08.0612 ◽

2020 ◽

Vol 17 (3) ◽

pp. 8150-8159

Author(s):

Kulwant Singh ◽

Gurbhinder Singh ◽

Harmeet Singh

Keyword(s):

Heat Treatment ◽

Friction Stir Welding ◽

Magnesium Alloys ◽

Mechanical Performance ◽

Fuel Efficiency ◽

Research Work ◽

Grain Structure ◽

Tensile Fracture ◽

Friction Stir ◽

The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

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