Learning Forum

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The material properties used in the model of the process of laser powder bed fusion, such as density, thermal conductivity and heat capacity, are assumed to be temperature-dependent. However, the accuracy of these properties, particularly at high temperatures, can have a significant impact on the model's prediction results ? how to explain that what is the accuracy of model in this case ?

[Akshay Maniyar]

Hi,

Yes, you are right. The accuracy of temperature-dependent material properties such as density, thermal conductivity, and heat capacity is crucial because these properties significantly influence the heat transfer and phase change phenomena that occur during the process. If the properties are not accurately represented, especially at high temperatures where the material behavior can change dramatically, the model's predictions for temperature distribution, melt pool dimensions, and cooling rates may be off. This can lead to incorrect predictions of microstructure, residual stresses, and distortions in the final part. To ensure the accuracy of the model, it is important to use reliable data for the material properties at the relevant temperature ranges. This data can be obtained from experiments or from validated databases. 

Thanks,

Akshay maniyar