EThe Effect Of T6 Heat Treatment On Microstructure And Thermal Stress Of Aluminium Composites With Reinforcement Of Coal Bottom Ash

Munir, Misbahul (2019) EThe Effect Of T6 Heat Treatment On Microstructure And Thermal Stress Of Aluminium Composites With Reinforcement Of Coal Bottom Ash. Undergraduate thesis, Untag 1945 Surabaya.

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Abstract

Thermal stress is the stress caused by the temperature difference between the outside and the inside of the material due to working temperature or rapid cooling during the T6 heat treatment process. In this study determine the effect of variations in cooling media and temperature of the cooling media on the thermal stress and microstructures of aluminum composites, the basic material of the material used is used piston waste with reinforcement of botton ash. In a variety of cooling media using SAE 40 oil, salt solution, well water with a temperature of cooling media 60˚C, 80˚C, and 100˚C. for data collection this study uses thermomechanical analysis (TMA) testing. From the results of the study, the thermal stress values in each type of cooling media where the highest thermal stress is in the selection of salt solution media with a temperature of 60˚C as coolant media as 0.154 MPa and the lowest thermal stress value in the selection of salt solution quenching media with 100˚C of 0.127 MPa. And also the effect on the microstructure with variations in cooling media and temperature of the cooling media, obtained the size of grain diameter of the test sample where the smallest grain size diameter was found in the selection of quenching media type salt solution with quenching media temperature 80˚C with an average grain size of 48, 47 µm and the largest grain size was located in the selection of quenching well water media with the temperature of quenching media 100˚C with an average grain size of 146.2 µm. Determining the type of cooling media and the temperature of the cooling media can affect the microstructure grain size and the thermal stress value.

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