Effect of Cross Section Reduction on the Mechanical Properties of Aluminium Tubes Drawn With Variable Wall Thickness

Bui, Quang‐Hien; Bihamta, Reza; Guillot, Michel; Rahem, Ahmed; Fafard, Mario

doi:10.1115/1.4005040

Cited by 7 publications

(4 citation statements)

References 25 publications

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“…Usually, magnesium (Mg) alloy microtubes are currently the most popular metallic materials for stents, which are typically made by laser-cutting a thin-walled microtube [6]. Die drawing such as hollow sinking has been used for fabricating microtubes [7][8][9][10]. However, tubes made of materials with low plasticity, such as Mg and Ni-Ti alloys, often break under a large reduction in the cross-sectional area during cold die drawing [5,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Achieving thin wall and high surface quality of magnesium alloy tubes in combined process of hollow sinking after die-less mandrel drawing

Kishimoto

2023

Int J Mater Form

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Dimensions and surface roughness of magnesium alloy tubes were evaluated to elucidate the flattening behavior of asperity on the outer surface and the optimal condition for achieving thin wall and high surface quality in the combined process of the hollow sinking after die-less mandrel drawing. ZM21 tubes were drawn using a die after die-less mandrel drawing. Dimensions and surface roughness were measured, and the stress state of the asperity during hollow sinking was evaluated using finite element and slab methods. The results indicated that in hollow sinking after die-less mandrel drawing when the speed ratio was large, both a thin wall and high inner and outer surface qualities can be achieved under low die reduction, where the outer surface roughness was the least, owing to relatively large die pressure and drawing stress. Additionally, enhancing the flattening of the asperity due to bulk plastic deformation in tension was difficult even if drawing stress increased when the speed ratio in die-less mandrel drawing was large. Therefore, when the speed ratio of the die-less mandrel drawing was large before hollow sinking, the largest outer surface flattening was achieved under low die reduction, wherein die pressure was large.

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Section: Introductionmentioning

confidence: 99%

Achieving thin wall and high surface quality of magnesium alloy tubes in combined process of hollow sinking after die-less mandrel drawing

Kishimoto

2023

Int J Mater Form

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“…It was also observed regarding drawing speed that velocities of 2 and 5 m/min would be more suitable for under pressure lubrication as well as reduction in tensile force [8]. Bui et al (2011) explored effect of level of reduction at cross-section of aluminate tube on the given mechanical properties in cold-drawing process. They showed that rising deformation has increased micro hardness, yield strength and ultimate tensile strength in samples; on the one hand, and reduced correspondent strain to ultimate tensile strength point and elongation, on the other hand [12].…”

Section: Introduction *mentioning

confidence: 99%

“…Bui et al (2011) explored effect of level of reduction at cross-section of aluminate tube on the given mechanical properties in cold-drawing process. They showed that rising deformation has increased micro hardness, yield strength and ultimate tensile strength in samples; on the one hand, and reduced correspondent strain to ultimate tensile strength point and elongation, on the other hand [12]. Gattmah et al (2017) have examined residual stress in cold-drawing process in steel tube (AISI 1010).…”

Section: Introduction *mentioning

confidence: 99%

Investigation on the effect of cold drawing process on mechanical properties and structure of seamless steel (Ck60) tube

Niknamian

2019

J. Appl. Sci. Eng. Technol. Educ.

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The cold drawing process is one of the precise metal forming techniques which have attracted attention by many researchers with respect to the given properties such as potential for improvement of mechanical properties of the material, achieving of accurate dimensional tolerances and rise of quality at final surface so that different studies are conducted on properties of various materials in the course of analysis of its effect. Using cold drawing and also exertion of special heat treatment cycle in this investigation, initially the seamless steel tube Ck60 has been produced and then effect of cold drawing has been assessed on the mechanical properties and structure of steel. The production process of seamless steel tube includes two phases of cold drawing which was followed by surface reduction levels 15.1% and 13.7% respectively. In order to analyze mechanical properties, tensile test and hardness-testing was used and metallography test was also employed to observe the structure. The given results indicate that the seamless steel tube Ck60 produced by means of this production process has ultimate tensile strength (1021 MPa), yield strength (950 MPa) and elongation (9%). Moreover, the value of hardness mean was 312 for the final tube in Vickers Hardness Test. The images taken from optical microscopy also show that the final structure of tube is uniform and as perlite ferrite.

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“…On the other hand, the welds made with a conical tool pin profile have the lowest tensile strength and elongation, suggesting that this tool profile results in weaker and less ductile welds. Bui et al (2011) performed experiments to investigate how reducing the cross-sectional area of variable thickness of aluminium tubes affects their microstructure and mechanical properties. Two distinct position-controlled mandrel techniques were employed to draw the tubes, and their mechanical properties were assessed in relation to the cross-sectional reduction.…”

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confidence: 99%

Experimental study to optimize cold working, aging temperature, and time on the properties of AA6061 tubes: analysis using design of experiment

et al. 2023

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The purpose of this study is to examine the impact of various process parameters, such as cold work, aging temperature, and aging time, on the yield strength, ultimate tensile strength (UTS), and elongation of AA6061 tubes. The experimental plan is carried out, and the data is analyzed using Design Expert software. Main effects plots and interaction plots are generated to visually examine the effects of individual factors and the interaction between two factors on the output response variables. ANOVA analysis is conducted to assess the statistical significance of the model and individual model coefficients. The results reveal that all input factors had a significant impact on yield, whereas cold work and temperature and their interaction are significant for UTS. However, the model is not significant for elongation. The most notable finding is that the aging temperature’s effect is significant than the other two factors. These study findings can inform future experiments or process optimization efforts by considering the combined impact of these factors and their interactions. The study also found that the optimal temperature range is between 155°C to 170°C, along with a recommended cold work percentage of 10% or more and preferred time of above 10 h up to overage time. The model achieved an overall accuracy rate of over 90%, indicating its ability to predict the response variable with a high degree of precision.

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Effect of Cross Section Reduction on the Mechanical Properties of Aluminium Tubes Drawn With Variable Wall Thickness

Abstract: Effect of cross section reduction on the mechanical properties of aluminium tubes drawn with variable wall thickness

Cited by 7 publications

References 25 publications

Achieving thin wall and high surface quality of magnesium alloy tubes in combined process of hollow sinking after die-less mandrel drawing

Achieving thin wall and high surface quality of magnesium alloy tubes in combined process of hollow sinking after die-less mandrel drawing

Investigation on the effect of cold drawing process on mechanical properties and structure of seamless steel (Ck60) tube

Experimental study to optimize cold working, aging temperature, and time on the properties of AA6061 tubes: analysis using design of experiment

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