Excellent mechanical properties obtained by low temperature extrusion based on Mg-2Zn-1Al alloy

Niu, Yanxia; Song, Zetian; Le, Qichi; Hou, Jian; Ning, Fangkun

doi:10.1016/j.jallcom.2019.05.297

Cited by 33 publications

(6 citation statements)

References 40 publications

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“…The number of samples was 4 × 4 × 3 = 48 samples. Four variations of nozzles (2, 3, 4, 5 mm), four pressure variations (5,15,25,35) bar, and three temperature variations (790, 820 and 850°C).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics

Akra

Akkaş

Boz

et al. 2020

Russ. J. Non-ferrous Metals

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The aim of this study is to investigate the AZ31 alloy powder production and characterization processes experimentally using the gas atomization method. For this purpose, firstly, the design and production of gas atomization units were done at Karabük University Faculty of Technology Department of Manufacturing Engineering. In this gas atomization unit, the manufacturability of AZ31 powder from magnesium alloys was investigated by the gas atomization method which is one of the production methods by powder metallurgy. The parameters and the literature used in the production of materials similar to the AZ31 alloy are taken into account as producibility parameters. In the gas atomization method, parameters such as nozzle diameter, gas pressure, and temperature must be controlled in order to produce the desired properties in metal powder production. The diameter of the nozzle is crucial because it affects the gas pressure and temperature, the size of the powder, and the shape of the powders. Experimental studies were carried out using 3 different temperatures (790, 820, and 850°C), 4 different nozzle diameters (2, 3, 4, and 5 mm) and 4 different gas pressures (5, 15, 25, and 35 bar). In the molten metal atomization process and in the process of forming a protective gas atmosphere, argon gas was preferred. Scanning electron microscopy (SEM) was used to determine the shape of the AZ31 powders produced, XRD, XRF, and SEM-EDX analyses were used to determine the phases in the internals of the produced powders and percentages of these phases. Laser measurement devices were used for powder size analysis and hardness tests were performed to determine the mechanical properties of the produced powders. The powders produced were pressed into masses at 4 different pressing pressures (300, 400, 500, and 600 MPa). The best sinterability values of the bulked powders and sintering process were performed at 3 different temperatures (500, 550, and 600°C). Density measurements were made after pressing and sintering the powders. As a result of the experimental studies, it was found that the powder size decreased with the increase of the gas pressure but the nozzle diameter, and the powder shape changed to the dripping and the spherical in the ligament and complex form. It has been observed that the temperature has no significant effect on the powder size and shape.

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Section: Methodsmentioning

confidence: 99%

“…Magnesium alloys have an importance in the defense industry and the transport industry due to their density of 1.74 g/cm 3 along with their lightweight and high specific strength properties [1][2][3][4][5][6]. Since it has low strength and toughness values without alloying, it is generally used by forming the alloy with other elements.…”

Section: Introductionmentioning

confidence: 99%

The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics

Akra

Akkaş

Boz

et al. 2020

Russ. J. Non-ferrous Metals

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“…CNT/fiber composites have been reported by some researchers. Different chemical modification of CNTs and many methods have been applied to different fabrics such as cotton, Kevlar, polyamide 6,6, polyester, polytetrafluoroethylene, and Nomex fiber . CNTs can impart good electrical conductivity, hydrophobicity, mechanical strength, tribological properties to different fabrics 171a,d,172,176.…”

Section: Graphene Modified Textile Composites In Relevant To the Propmentioning

confidence: 99%

“…Different chemical modification of CNTs and many methods have been applied to different fabrics such as cotton, Kevlar, polyamide 6,6, polyester, polytetrafluoroethylene, and Nomex fiber . CNTs can impart good electrical conductivity, hydrophobicity, mechanical strength, tribological properties to different fabrics 171a,d,172,176. Due to its good electrical conductivity, most CNTs/fabric composites show remarkable applicability as smart textiles (conductive textile, capacitors, sensor, and electromagnetic shielding) .…”

Section: Graphene Modified Textile Composites In Relevant To the Propmentioning

confidence: 99%

Graphene Modified Multifunctional Personal Protective Clothing

Bhattacharjee

Joshi

Chughtai

et al. 2019

Adv Materials Inter

180

134

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Personal protective clothing is intended to protect the wearer from various hazards (mechanical, biological, chemical, thermal, radiological, etc.) and inhospitable environmental conditions that may cause harm or even death. There are various types of personal protective clothing, manufactured with different materials based on hazards and end user requirements. Conventional protective clothing has impediments such as high weight, bulky nature, lack of mobility, heat stress, low heat dissipation, high physical stress, diminishing dexterity, diminishing scope of vision, lack of breathability, and reduced protection against pathogens and hazards. By virtue of the superlative properties of graphene, fabrics modified with this material can be an effective means to overcome these limitations and to improve properties such as mechanical strength, antibacterial activity, flame resistance, conductivity, and UV resistance. The limitations of conventional personal protective equipment are discussed, followed by necessary measures which might be taken to improve personal protective equipment (PPE), the unique properties of graphene, methods of graphene incorporation in fabrics, and the current research status and potential of graphene‐modified performance textiles relevant to PPE.

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“…Numerous studies focused on the optimization of extrusion process of Mg alloys to achieve desirable microstructure and mechanical properties, including extrusion temperature, extrusion speed and extrusion ratio [6-9, 16, 19-21]. It was verified that the appropriate extrusion temperature contribute greatly to obtain the ultrafine-grained microstructure, which not only helped the increase of strength, but also offered the possibility for the plasticity improvement [8,[19][20][21]. As for ZK60 alloy, when the extrusion temperature was higher than 350 °C, it was found that the grain size of the extruded alloy was not fine enough (generally > 5 μm), which caused an unsatisfactory yield strength (generally less than 150 MPa) [8,9,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effect of extrusion temperature on the microstructure and mechanical properties of hot-extruded ZK60 magnesium alloy

Ma,

Chen

et al. 2023

Mater. Res. Express

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ZK60 magnesium alloy was prepared by the hot-pressed sintering combined with the hot-extruded technique. The microstructure and mechanical properties evolution of ZK60 alloy with a reduced extrusion temperature from 350 °C to 250 °C were investigated in detailed. The extruded alloy was mainly composed of fine α-Mg grains and MgZn2 phase. The grains size gradually decreased with a reduction in extrusion temperature, and the yield strength obviously increased accordingly. The alloy extruded at 250 °C exhibited the smallest average grain size of 2.5 μm and the best combination of strength and plasticity, with a yield strength of 279 MPa and fracture strain of 18.1% in compressive condition, and 263 MPa and 13.7% in tensile condition, as well as a tension-compression yield asymmetry of 0.94. Both the fine grains formed by the continuous and twin induced dynamic crystallization mechanism and the precipitation strengthening contributed to the strength improvement.

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Excellent mechanical properties obtained by low temperature extrusion based on Mg-2Zn-1Al alloy

Cited by 33 publications

References 40 publications

The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics

The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics

Graphene Modified Multifunctional Personal Protective Clothing

Effect of extrusion temperature on the microstructure and mechanical properties of hot-extruded ZK60 magnesium alloy

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