Orientation dependence of microcosmic plasticity and toughness in Nb-Si alloys

Effect of C Addition on the Microstructure and Fracture Properties of In Situ Laminated Nb/Nb5Si3 Composites

“…Second, the fracture toughness can be affected by some physical properties. According to the Ashby model [33], the toughness increment ∆K C can be expressed as Equation (10):…”

“…The Nb 5 Si 3 intermetallic compound has been considered as a potential material for high-performance structural application due to its high melting point (2520 • C), low density (7.1 g/cm 3 ), and excellent strength retention at elevated temperatures [1][2][3]. However, due to the relatively low fracture toughness of 1-3 MPa•m 1/2 at ambient temperatures [4], a ductile niobium-based solid solution (Nb ss ) was brought into Nb 5 Si 3 to achieve a balance of low fracture toughness and high temperature strength [5][6][7][8][9][10][11][12]. As for the as-cast Nb-Si alloy, with the increase in Si content, the volume fraction of ductile Nb ss phase decreased, thereby significantly lowering the fracture toughness [13,14].…”

Why do cracks occur in the weld joint of Ti-22Al-25Nb alloy during post-weld heat treatment?

“…(Ma et al, 2020;Rominiyi and Mashinini, 2023). The technique has been used for extracting residual stress field (Zhou et al, 2015), investigating the phase transformation process (Wang et al, 2017), and examining the hardness and Young's modulus (Jin et al, 2023). In particular, the in situ nanoindentation technique is conducted using a scanning electron microscope (SEM), which can visualize the behavior of the material in real-time (Juri et al, 2021).…”