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Tratamentos Térmicos Pós-Soldadura de Juntas Dissimilares Envolvendo Ligas de Alta Entropia
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Neste trabalho conseguiu-se com sucesso observar o efeito dos tratamentos térmicos,
comparando as amostras sem tratamento térmico e as amostras após tratamentos térmicos pós-
soldadura a 1000ºC e a 1150ºC durante 1h.
A microestrutura após- tratamento térmico o tamanho medio de grão aumentou em todas a zonas
das amostras e as Microdurezas após-tratamento térmico uniformizaram, tendo diminuindo no
processo como esperado pela analise da microestrutura.
No ensaio de Tração Uniaxial após- tratamento térmico a amostra ganhou muita capacidade de
alongamento, mas perdeu um pouco da sua tensão máxima quando comparada com a amostra
sem tratamento térmico.
O estudo foi um sucesso devido a uniformização de puridades pela amostra sendo visível nas
Microdurezas e na deslocação da zona de fratura pelas diferentes amostras, embora tenha avido
alguma diminuição da Microdureza e da tensão máxima no ensaio de Tração Uniaxial.
In this work, it was successfully possible to observe the effect of heat treatments, comparing samples without heat treatment and samples after post-welding heat treatments at 1000ºC and 1150ºC for 1h. The microstructure after heat treatment, the average grain size increased in all areas of the samples and the microhardness after heat treatment became uniform, decreasing in the process as expected from the analysis of the microstructure. In the Uniaxial Tensile test after heat treatment, the sample gained a lot of stretching capacity, but lost some of its maximum tension when compared to the sample without heat treatment. The study was a success due to the uniformity of purities across the sample being visible in the Microhardness and the displacement of the fracture zone across the different samples, although there was some decrease in Microhardness and maximum stress in the Uniaxial Tensile test.
In this work, it was successfully possible to observe the effect of heat treatments, comparing samples without heat treatment and samples after post-welding heat treatments at 1000ºC and 1150ºC for 1h. The microstructure after heat treatment, the average grain size increased in all areas of the samples and the microhardness after heat treatment became uniform, decreasing in the process as expected from the analysis of the microstructure. In the Uniaxial Tensile test after heat treatment, the sample gained a lot of stretching capacity, but lost some of its maximum tension when compared to the sample without heat treatment. The study was a success due to the uniformity of purities across the sample being visible in the Microhardness and the displacement of the fracture zone across the different samples, although there was some decrease in Microhardness and maximum stress in the Uniaxial Tensile test.