Details

Autor(en) / Beteiligte

• Thakre, Sanket
• Karan, Vir
• Kanjarla, Anand K.

Titel

Quantification of similarity and physical awareness of microstructures generated via generative models

Ist Teil von

• Computational materials science, 2023-03, Vol.221, p.112074, Article 112074

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Large repositories of microstructure realizations lie at the centre of developing effective structure–property correlations in materials. It is, however important that the microstructure generation procedures not only reconstruct a large number of microstructures in a computationally inexpensive manner but also hold awareness regarding the physical significance of the underlying microstructure. While machine learning techniques are used for computationally efficient microstructure generation, the similarity and physical awareness of the generated microstructures with the ground truth are rarely quantified. In this work, we use a variant of generative adversarial network (GAN) i.e. StyleGAN2, to generate microstructures with varied morphologies from a small dataset of Dual Phase (DP) steels. The similarity between the generated and the original microstructures is quantified using various metrics such as structure similarity index (SSIM), peak signal to noise ratio (PSNR) and signal to noise ratio (SNR). The physical awareness is quantified by comparing the predictions of macroscopic mechanical properties of the GAN generated and original microstructures using a reduced order model. We also qualitatively estimate the learning of the GAN latent space in terms of microstructure morphology. It is observed that there exists a relationship between the microstructure morphological information and the similarity assessment metrics. [Display omitted] •StyleGAN2 with ADA is used to generate similar microstructures from a small dataset.•Latent Space studies show that the GAN is learning morphological parity of data.•Similarity studies show a relationship between the metrics and data morphology.•Awareness studies show that the ROM can assess damage in generated microstructures.•This work can be appended to a prediction framework for its rigorous validation.