Strengthening mechanisms and modelling of mechanical properties of submicron-TiB2 particulate reinforced Al 7075 metal matrix composites

Investigating the Microstructural and Mechanical Properties of Novel Ternary Reinforced AA7075 Hybrid Metal Matrix Composite

“…Hence, the n-HMMC showed the highest porosity following MMC, s-HMMC, and the base alloy. The same trend was mentioned in references [ 18 , 52 , 58 , 59 ]. The increase in porosity was due to the improper mixing of the reinforcement particles and the matrix, as shown in Figure 7 b.…”

Effect of B4C reinforcement and hot rolling on microstructure and mechanical properties of WE43 magnesium matrix composite

“…Similar observations were also reported by Xiang et al 49 and Sahoo et al. 54 Actually, the strengthening mechanisms associated with the microstructure features of the matrix have not been quantitatively considered in this evaluation, and B 4 C particles are assumed to be solely responsible for strength enhancement. As previously stated, RE-containing precipitates in submicron size have emerged in the WE43 matrix following the hot rolling process, and their volume fraction has grown as B 4 C content increases.…”

“…The YS of hot-rolled WE43-B 4 C MMCs can be theoretically calculated using a modified Clyne model, which was originally developed to predict the strength of MMCs with micron-sized reinforcements. 54 Assuming the strengthening mechanisms are interdependent, the modified Clyne model uses the quadratic summation method to incorporate the contribution of the above-discussed strengthening mechanisms. In order to evaluate the precision of calculated σ Y c using equation (8), a comparison is conducted here with those experimental values provided in Figure 11. Figure 12(a) shows a good agreement between theoretical and experimental results, particularly at lower weight fractions.…”

“…The YS of hot-rolled WE43-B 4 C MMCs can be theoretically calculated using a modified Clyne model, which was originally developed to predict the strength of MMCs with micron-sized reinforcements. 54 Assuming the strengthening mechanisms are interdependent, the modified Clyne model uses the quadratic summation method to incorporate the contribution of the abovediscussed strengthening mechanisms.…”

Microstructural evolution and mechanical properties of TiB2/2195 composites fabricated by ultrasonic-assisted in-situ casting

“…where is the strengthening coefficient (1.25 for Al [48] , [49] ), is the difference between the CTEs of the matrix and the reinforced particles, and the CTE values of the Al matrix and TiB 2 particle are 25.2 × 10 -6 /K [46] and 7.8 × 10 -6 /K [50] , respectively, so = 17.4 × 10 -6 /K; is the difference between the pouring temperature and the test temperature [51] , the pouring temperature is 993 K, and the test temperature is 298 K, so = 695 K; b is the Burger vector; is the average size of the reinforcing particles, about 200 nm in the composite with UT for 180 s. is the volume fraction of the reinforcing particles, and the mass fraction of 2 % is converted into a volume fraction of 1.2 %. is the shear modulus of the matrix, which can be calculated from the following formula [52] : …”