An investigation on grain refinement mechanism of TiB2 particulate reinforced AZ91 composites and its effect on mechanical properties

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

“…In addition, some dislocations near intragranular grains can be clearly observed. It has been reported that the intragranular structure and accumulation of dislocations are beneficial to improving the mechanical properties of ceramic composites [ 27 , 28 , 29 ].…”

Grain Refinement of AZ91 Magnesium Alloy Induced by Al-V-B Master Alloy

“…As shown in Figure 8a, three phases are surrounded by primary Mg matrix. According to the element mapping (see Figure 8b-f) and previous literatures [19,23,28,32], it can be deduced that the coarse irregular phase, white polygon particles, and small concentrated particles are Mg 17 Al 12 , Al 8 Mn 5 , and VB 2 intermetallic compound, respectively. Although it can be observed that some VB 2 particles are surrounded by Mg 17 Al 12 phase, the isolated VB 2 particles embedded in primary Mg matrix still can be found.…”

“…During the past decades, achieving grain refinement in Mg-Al alloys has been demonstrated to be an extremely difficult issue, although several methods have been developed including superheating [8,9], mechanical shearing [10], ultrasonic wave [11][12][13], electromagnetic fields [14,15], addition of solute elements [16][17][18][19][20][21], inoculations [22][23][24][25][26][27][28]. For instance, superheating applied on a commercial scale is less practical owing to the requirement for rapid cooling from the treatment temperature to pouring temperature.…”

Study on microstructure of NiAl matrix high temperature lubricating composites containing BaO/TiO2 metallic oxide

“…Meanwhile, the diffraction peaks of NiAl slightly shift to the left ( figure 2(b)). It is probably due to the elements dissolve in the NiAl matrix [26][27][28]. The crystal plane distance of NiAl phase is 0.2462 nm and is bigger than that in NiAl material of 0.2451 nm according to the Bragg equation.…”