Anisotropy of micro-evolution and spall behavior of free-cutting steel containing bismuth under shock loadingYuan Fan, Fazhan Wang, Menghui Liu, Guangyuan Li, Zhanwen Chen, Pan Li, Kai Jiang and Hong WuEur. Phys. J. Plus, 140 2 (2025) 125DOI: https://doi.org/10.1140/epjp/s13360-025-06020-w