“…However, it is essential to note that the presence of bioactive glass particles and areas with high strain in the near-surface zone can increase the likelihood of precipitation of the β-Mg 17 Al 12 phase and α + β eutectic in this area. Other studies have also reported that the presence of secondphase particles and high-strain regions can affect the nucleation of the β-Mg 17 Al 12 phase and α + β eutectic [36][37][38][39].…”
Section: Resultsmentioning
confidence: 96%
“…However, it is essential to note that the presence of bioactive glass particles and areas with high strain in the near-surface zone can increase the likelihood of precipitation of the β-Mg 17 Al 12 phase and α + β eutectic in this area. Other studies have also reported that the presence of second-phase particles and high-strain regions can affect the nucleation of the β-Mg 17 Al 12 phase and α + β eutectic [36–39]. Figure 6 The SEM micrograph of; (a) as-cast AZ91 alloy, (b) extruded AZ91 alloy, (c) centre zone of sample C-FE, (d) near surface zone of sample C-FE, (e) centre zone of sample E-FE, (f) near surface zone of sample E-FE.…”
The effect of the pre-friction extrusion microstructure of AZ91 billet on the microstructure, mechanical properties, and corrosion resistance of AZ91-bioactive glass surface composite rods was investigated. The results show that friction extrusion on AZ91 alloy billet with cast microstructure results in agglomerated bioactive glass particles in the composite rod microstructure. Compared to as-cast AZ91 alloy, friction extrusion on AZ91 alloy billet with cast microstructure results in 93% more corrosion resistance. Also, friction extrusion on AZ91 alloy billet with extruded microstructure leads to a gradient AZ91-bioactive glass composite rod with ultimate tensile strength, yield strength, and corrosion resistance of 9, 2, and 74% higher than AZ91 alloy rods, respectively.
“…However, it is essential to note that the presence of bioactive glass particles and areas with high strain in the near-surface zone can increase the likelihood of precipitation of the β-Mg 17 Al 12 phase and α + β eutectic in this area. Other studies have also reported that the presence of secondphase particles and high-strain regions can affect the nucleation of the β-Mg 17 Al 12 phase and α + β eutectic [36][37][38][39].…”
Section: Resultsmentioning
confidence: 96%
“…However, it is essential to note that the presence of bioactive glass particles and areas with high strain in the near-surface zone can increase the likelihood of precipitation of the β-Mg 17 Al 12 phase and α + β eutectic in this area. Other studies have also reported that the presence of second-phase particles and high-strain regions can affect the nucleation of the β-Mg 17 Al 12 phase and α + β eutectic [36–39]. Figure 6 The SEM micrograph of; (a) as-cast AZ91 alloy, (b) extruded AZ91 alloy, (c) centre zone of sample C-FE, (d) near surface zone of sample C-FE, (e) centre zone of sample E-FE, (f) near surface zone of sample E-FE.…”
The effect of the pre-friction extrusion microstructure of AZ91 billet on the microstructure, mechanical properties, and corrosion resistance of AZ91-bioactive glass surface composite rods was investigated. The results show that friction extrusion on AZ91 alloy billet with cast microstructure results in agglomerated bioactive glass particles in the composite rod microstructure. Compared to as-cast AZ91 alloy, friction extrusion on AZ91 alloy billet with cast microstructure results in 93% more corrosion resistance. Also, friction extrusion on AZ91 alloy billet with extruded microstructure leads to a gradient AZ91-bioactive glass composite rod with ultimate tensile strength, yield strength, and corrosion resistance of 9, 2, and 74% higher than AZ91 alloy rods, respectively.
“…The geometric dimensions of all lap joints are shown in Figures 1-3. [54]. Carbon fiber composite plates with a density of 1.8 g/cm 3 have mechanical properties such as a 2.1% elongation at break, 4a 900 MPa tensile strength and a 230 GPa tensile modulus [55].…”
Section: Methodsmentioning
confidence: 99%
“…Carbon fiber composite plates with a density of 1.8 g/cm 3 have mechanical properties such as a 2.1% elongation at break, 4a 900 MPa tensile strength and a 230 GPa tensile modulus [55]. AZ91 Mg alloy has mechanical values as a 65.3 HV stiffness, a 212.6 MPa tensile strength, a 120.5 MPa 0.2% yield strength and a 4.8% elongation [54]. Carbon fiber composite plates with a density of 1.8 g/cm 3 have mechanical properties such as a 2.1% elongation at break, 4a 900 MPa tensile strength and a 230 GPa tensile modulus [55].…”
Today, especially in many fields that require structural durability, such as the aerospace and automotive industries, there has been a need to use different bonding techniques separately or together in order to use materials together with different mechanical properties. In this study, stress and damage analysis of single lap joints, bonding and bolt-bonding metal/composite joints under tensile loads were performed. The nine kinds of single lap joint models in different combinations (bonded, bolted and bolt-bonded) were prepared by using acrylic adhesive (Acrytron 1E1) and 100-25-3 mm in size; AZ91/AZ91, AZ91-carbon fiber and carbon fiber-carbon fiber plates. Some comparisons were carried out by examining the stresses and deformations that occur in joint models exposed to tensile and 4-point bending tests. As a result of the tensile test, it was determined that the highest maximum tensile stress occurred in AZ91-CF bolt-bonded samples. In the four-point bending test, the maximum shear force value was determined in the CF-CF bolted-bonded samples.
“…Recently, magnesium (Mg) based materials are gaining wide popularity due to their attractive properties including low density compared to aluminium and steel, and ability to withstand vibrations and mechanical loads [11][12][13]. Mg based hybrid composites can be used in aircraft, automobile, and electronic industries [14][15][16][17]. AZ91E is a widely used commercial Mg alloy in the manufacturing field among the available Mg alloys [18][19][20].…”
In the present study, hybrid composites of AZ91E reinforced with granite powder and fly ash powder were fabricated by stir casting route. The reinforcing material was added in different weight fractions (2.5 and 5 % each). The densities of the composites were measured between 1.74−1.8 g/cm3. The role of different weight percentages of reinforcements on the machining behavior was investigated. Increased microhardness was measured for the composites due to the presence of the reinforcing material. Higher cutting forces were measured for the composites containing higher fraction of reinforcements. With the increased cutting speed (420 to 715 rpm) the cutting forces were observed as decreased and with the increased depth of cut (0.2 and 0.4 mm), higher cutting forces were recorded. At higher fraction of reinforcements, discontinuous chips were observed for the composites. The results demonstrate the significant role of granite powder and the fly ash powder on enhancing the mechanical properties (up to 66% compared with the base alloy) but also on increasing the difficulty level in machining.
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