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Design and Performance Evaluation of a Sustained Load Dual Grip Creep Testing Machine

Journal of Minerals and Materials Characterization and Engineering 2014年第6期2卷 531-538页

作者： Kenneth Kanayo Alaneme Bethel Jeremiah Bamike godwin omlenyi Department of Metallurgical and Materials Engineering Federal University of Technology Akure Nigeria Department of Mining and Metallurgical Engineering University of Namibia Ongwediva Engineering Campus Ongwediva Namibia

The design and performance evaluation of a sustained load creep testing machine was undertaken in this research. The design was motivated by the need to make locally available, a cost effective, technically efficient, and easily operated creep testing facility;for creep behaviour studies of materials. Design drawings and purchase of materials and components for the design were undertaken after thorough evaluation of the following design and materials selection criteria: design principle and theory, local availability of raw materials and components required for the design, material properties, cost of materials and design, ease of utilization and maintenance, and basis of testing and data capture. The machine casing and frame, heating chamber (consisting of the furnace and a dual specimen mounting stage), load lever and hanger system, and the electro-technical components;were fabricated and coupled following the produced design specifications. The machine was tested and its performance was assessed using its heating efficiency, repeatability and reproducibity of experimental test results, maintainability and cost-effectiveness as criteria. It was observed from repeat tests that the machine has the capacity of generating reliable data for computing creep strain-time results. The efficiency and temperature regulating capacity of the heating unit of the machine were also observed to be very satisfactory. The cost of the design was about 112,000 Naira ($700.00) which is cheaper in comparison to similar commercial creep testing machines from abroad. The machine was also found not to pose maintenance or repairs challenges.

关键词： Creep Failure Analysis Machine Design Strain Rate Sustained Load Fracture

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