Influence of extrusion parameters on drilling machinability of AZ31 magnesium alloy

Köklü, Uğur; Koçar, Oğuz; Morkavuk, Sezer; Giasin, Khaled; Ayer, Önder

doi:10.1177/09544089221080820

Cited by 14 publications

(3 citation statements)

References 59 publications

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“…CFRP, aluminum alloys, and magnesium alloys have been used in vehicle bodies to achieve lightweight due to their high specific strength. [2][3][4] These lightweight materials promote the realization of multimaterial hybrid car bodies, but they also pose challenges to the joining processes between dissimilar sheets.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the pre-holed screw-drilling riveting process for joining dissimilar lightweight sheets

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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The use of lightweight sheets such as carbon fiber reinforced composites (CFRP), magnesium alloys, and aluminum alloys is of great significance to realize the lightweight of automobiles. However, the differences between the sheets make the joining processes of dissimilar sheets a great challenge. A pre-holed screw-drilling riveting (PH-SDR) process is proposed based on a study of existing joining processes, the rivet with threads is riveted into the sheets by rotating, and the effective joining between the sheets is achieved by embedding the sheets into the rivet threads. The joint strength of the PH-SDR and self-piercing riveting (SPR) was compared through the lap-shear test. It was found that in the case of 1 mm Al6061-T6 + 2 mm AZ31B, the strength of the PH-SDR joint was 3.09 kN, which is 30.9% higher than the SPR of 2.36 kN. In the case of 2 mm CFRP + 2 mm Al6061-T6, when the spindle speed was 600 rpm, the strength of 5.43 kN and the energy absorption of 20.3 J were obtained for the PH-SDR joint, which is 51.2% and 89.7% higher than the optimal SPR joint. The results show that the proposed PH-SDR process provides a feasible solution for the joining of dissimilar lightweight sheets.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on the pre-holed screw-drilling riveting process for joining dissimilar lightweight sheets

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…These state-of-the-art techniques can be used to enhance the mechanical properties of low-ductility and high-utility alloys like the magnesium and titanium alloys [ 13 ], most notably those having rare earth alloying elements. Various extrusion ratios have been tested on Mg-AZ31 alloy, so as to demonstrate its machinability properties in terms of milling and drilling operations [ 14 ]. To produce materials with evenly distributed arrays of ultrafine grains and better mechanical characteristics, including extraordinary superplastic capabilities, SPD methods were therefore introduced for the manufacturing of magnesium alloys.…”

Section: Background and Introductionmentioning

confidence: 99%

Investigation of Severe Plastic Deformation Effects on Magnesium RZ5 Alloy Sheets Using a Modified Multi-Pass Equal Channel Angular Pressing (ECAP) Technique

et al. 2023

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The present study investigates the effects of multiple passes of equal channel angular pressing (ECAP) on magnesium alloy sheets with the assistance of an Inconel plunger along with a die setup having a channel angle of 120° and corner angle of 10° operating at a temperature of 200 °C followed by the required heat treatment processes. The microstructural analysis of the sheet samples at various stages of the multi-pass hot ECAP has shown evidence of ultrafine grain refinement (UFG) due to the occurrence of severe plastic deformation. X-ray diffraction analysis has also exhibited the presence of phases like MgZn and CeZn3 which is supposedly responsible for the enhancement of the mechanical properties. As a result, the room temperature tensile and compressive strengths have improved by 6.12% and 6.63%, respectively, after the second pass, and 11.56% and 15.64%, respectively, after the fourth pass of ECAP. Additionally, the hardness of the sheets has increased by 6.49% and 16.64% after the second and fourth pass of hot ECAP, respectively, mainly attributed to the drastic decrease in grain size from 164 μm to 12 μm within four ECAP passes, all these with a negligible change in ductility. This success in the thermomechanical processing of Mg-RZ5 alloy sheets using a die channel angle of 120° with a minimal number of passes of hot ECAP under a controlled equivalent strain, further opens doors for incorporating optimizations and/or additional aspects so as to achieve even better grain refinements, and consequently, mechanical strength improvements thereby catering to the industrial needs of aerospace and construction areas.

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“…In the literature [14], after adding different contents of Bi to Mg alloy, it was found that the addition of Bi prolongs the aging process of the alloy and also effectively suppresses the appearance of discontinuous precipitation. Also, the addition of Bi resulted in the precipitation of a continuous precipitation phase, which is a complex semi-coherent lattice phase relationship between the phase and the matrix, improving the mechanical properties of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Study on the work-hardening behavior and tissue property analysis of high-strength magnesium alloy

Zhang,

Liang,

et al. 2023

Applied Mathematics and Nonlinear Sciences

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Magnesium alloys show great superiority for modern applications due to their good biocompatibility, degradability, and excellent mechanical properties. In this paper, the strengthening effects and mechanisms of composite precipitation phases, microalloying regulated recrystallization behavior, composite grain organization, and new strain aging methods in magnesium alloys are investigated in terms of five stages of work hardening, heat treatment, and strengthening properties. The use of rare earth elements can effectively enhance the aging strengthening properties of magnesium alloy through the use of gadolinium (Gd) and yttrium (Y) in rare earth elements for the development of high-strength magnesium alloy. The results show that the solubility of aluminum in magnesium reaches the maximum of 12.6mmass.% at the eutectic temperature of 436℃and then gradually decreases with the decrease of temperature, and when the temperature decreases to room temperature, the solubility decreases to 2mass.%. The elongation of alloy 0.5Al alloy 0.5Zr alloy on the basis of the aging state was 6.7% and 4.8%, respectively. This paper provides theoretical and experimental guidance for the development of high-strength magnesium alloys through an in-depth study of strengthening mechanisms such as composite precipitation strengthening, crystal strengthening and strain aging strengthening.

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Influence of extrusion parameters on drilling machinability of AZ31 magnesium alloy

Cited by 14 publications

References 59 publications

Experimental investigation on the pre-holed screw-drilling riveting process for joining dissimilar lightweight sheets

Experimental investigation on the pre-holed screw-drilling riveting process for joining dissimilar lightweight sheets

Investigation of Severe Plastic Deformation Effects on Magnesium RZ5 Alloy Sheets Using a Modified Multi-Pass Equal Channel Angular Pressing (ECAP) Technique

Study on the work-hardening behavior and tissue property analysis of high-strength magnesium alloy

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