Materials Science and Engineering: A

Sress-strain data used in Figure 4.

Microscopic characterization and mechanical properties

Through an innovative fatigue test design, the initiation and propagation of fatigue cracks were observed with a microscope in real time, and the effects of surface nanocrystallization on the fatigue properties of pure Zr were systematically studied in the work. The results showed that the fatigue limit of pure Zr treated by ultrasonic shot peening (USSP) for 45 min was up to 11.2% higher than that of the original pure Zr. Both the initiation life and propagation life of fatigue cracks could be increased after USSP treatment. When the cyclic stress was set as 225 MPa, the initiation life and propagation life of fatigue cracks in the 45-min USSP-treated pure Zr were 3.1 times and 1.48 times those of the original samples, respectively. The lower the cyclic stress was, the more obvious the improvement in the initiation life of the fatigue cracks. This improvement in initiation life was the main reason for the promotion in the overall fatigue life of the USSP-treated samples. The results of the fatigue fracture analysis showed that a large number of secondary cracks and dimples appeared in both the original and the USSP-treated samples. However, the fatigue bands in the original pure Zr were disorderly, whereas those in the USSP-treated pure Zr were parallel to each other and perpendicular to the direction of crack propagation.

This data mainly about the lattice strain analzation of precipitates in an aged Al-Mg-Si alloy by GPA. And analysis of relevant data in this work.

Impact toughness data of UNS S32205 wrought material and UNS S32205 aged at 850 °C for 5 minutes and at 950 °C for 15 minutes

Figures.

The data is the original data about age hardening curves of the SiC-7075Al and HEA-7075Al composites

This is the original data from SHPB and quasistatic testing used to calculation of SRS

data supplement

In this study, the influence of multiwall carbon nanotubes (MWCNT) additions on the mechanical properties of sintered Ti6Al4V-based nanocomposites was investigated. The nanocomposites were fabricated with varying weight fractions of MWCNT (0.5, 1.0 & 1.5 wt.%) using the spark plasma sintering (SPS) technique. Investigations were carried out using nanoindentation of varying indentation loads (50 mN, 75 mN and 100 mN) to assess the nanohardness (H) and reduced elastic modulus (Er) of the alloy and nanocomposites. Further analysis was done to evaluate the elastic recovery index (W_e⁄W_t ), plasticity index (W_p⁄W_t ), elastic strain resistance (H⁄E_r ) and yield pressure (H^3⁄(E_r^2 )) at the maximum load. Microstructural analysis revealed the presence of the MWCNT dispersed across the alpha and beta phases of the Ti6Al4V matrix. The nanoindentation studies showed that the nanohardness, elastic modulus, elastic recovery index, elastic strain resistance and anti-wear properties improved with the MWCNT addition and continually increased with increase in nanotubes content. Also, it was observed that the nanohardness and reduced elastic modulus of the fabricated nanocomposites are in the range of 4677-9276 MPa and 29.3-60.9 GPa respectively which declined with increase in indentation load. The sintered Ti6Al4V displayed the least resistance to plastic deformation.