Ultrafine grain processing window and hot deformation mechanism in hard-to-deform GH4151 superalloy with high γ′ phases

Key Points

• Deformation mechanisms depend significantly on the ultrafine grain processing window, affecting material properties.
• High γ′ phases play a crucial role in the hard-to-deform characteristics of GH4151 superalloy.
• Analysis of ultrafine grain structures showed significant effects on processing windows and mechanical behavior.
• Enhanced understanding of deformation can lead to better processing methods for hard-to-deform materials.