Research on the microstructure and properties of a multi-pass friction stir processed 6061Al coating for AZ31 Mg alloy

Xiong, Xiaoming; Yang, Yan; Li, Jinguang; Li, Minmin; Peng, Jian; Chen, Wen; Peng, Xiaodong

doi:10.1016/j.jma.2019.09.001

Cited by 35 publications

(12 citation statements)

References 29 publications

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“…The hierarchical structure included two parts: the criterion layer and the sub-criterion layer. Therefore, according to Table 6, a pairwise comparison matrix A1 for D1, D2 and D3 with respect to C1 was firstly constructed and then the relative weight vector w 1 (3) was calculated. The position weight was set to 0 for factors in the sub-criterion layer that had no effect on C1.…”

Section: A Ij Scalementioning

confidence: 99%

“…Thus, the relative weight vectors w 1 (3) of six factors with respect to C1 were constructed. Similarly, the relative weight vectors w 2 (3) of each factor with respect to C2 may be constructed using the same method.…”

Section: A Ij Scalementioning

confidence: 99%

“…However, the greatest challenge for joining dissimilar materials of aluminum and magnesium alloys is the formation of intermetallic compound (IMC) phases in the welded joint of the two alloys. Intermetallic compounds can easily lead to cracks in the welds [3,4]. Researchers have attempted to join dissimilar aluminum/magnesium alloys using brazing [5], diffusion welding [6], ultrasonic welding [7], laser welding [8], resistance welding [9], and arc welding [10], but each of these methods is associated with unique problems.…”

Section: Introductionmentioning

confidence: 99%

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Dissimilar Friction Stir Lap Welding of Al to Mg: Characteristic Signal, Microstructure and Mechanical Properties

et al. 2020

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The spindle characteristic signal (forces and vibrations) at different friction stir lap welding (FSLW) parameters were studied. The result indicated that the spindle force and vibration have different trends with the change of welding parameters. For further study, the spindle dynamic performance evaluation model by means of the Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS method) was established. The model was used to calculate the relative approach degree B under different welding process parameters. The correlation between the characteristic signal and the joint properties was obtained. The model was validated by mechanical performance testing and microscopic observation. The results showed that the model evaluations were consistent with the experimental results.

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Section: A Ij Scalementioning

confidence: 99%

Section: A Ij Scalementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dissimilar Friction Stir Lap Welding of Al to Mg: Characteristic Signal, Microstructure and Mechanical Properties

et al. 2020

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“…In the AZ31 alloy, β-Mg17Al12 is the most common second phase presented at the grain boundaries of the matrix phase α-Mg [65]. According to the Mg-Al phase diagram, the transformation of β-Mg17Al12 takes place at the temperature of 437 • C [66]. As a well-known solid-state welding method, the peak temperatures measured during the friction stir welding is relatively lower than this temperature (like the maximum peak temperature of 382 • C recorded in this work).…”

Section: Hardness Of the Jointsmentioning

confidence: 99%

Refined Microstructure and Enhanced Hardness in Friction Stir-Welded AZ31 Magnesium Alloy Induced by Heat Pipe with Different Cooling Liquid

Zhang

Chen

et al. 2019

Metals

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The temperature field in welded plates has a significant influence on the microstructure and thereby their properties during friction stir welding (FSW). In this work, a self-designed heat pipe with different cooling liquid was applied in the FSW process for AZ31 magnesium alloy. The temperature fields, microstructures and properties of the welded joints were investigated. The peak temperatures and the durations of high temperature at both the advancing side and the retreating side decrease during the FSW process after applying the heat pipe and adding the ambient temperature water in the condensing tank. The top part of the weld nugget zone of the joint shows a significant decrease as well as its middle part due to the cooling effect of the heat pipe. The microstructure of the weld nugget zone is refined, associated with the increase in the hardness after applying the heat pipe. When the cooling liquid turns into ice water, grains in the weld nugget zone become significantly smaller and have a more homogeneous size. The mean value of hardness increases and the corresponding deviation is declined. Therefore, these results indicate that the application of the heat pipe and the employment of ice water as the cooling liquid can further refine the microstructure and enhance the strength of the material.

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“…Modifying the surface of existing materials to enhance their surface properties while not affecting the properties in the sub-surface region is more economical than fabricating the bulk materials. Various surface treatment techniques, such as laser cladding, plasma spraying process, friction stir cladding, physical vapor deposition and chemical vapor deposition, have been developed over the years [1][2][3][4][5]. Among these approaches, laser cladding has attracted a high level of interest of the scientific community due to its distinct advantages including faster processing rates, better control of coating thickness, minimal dilution, ease of equipment availability, maintainability and metallurgical substrate/coating bonding [6].…”

Section: Introductionmentioning

confidence: 99%

Laser Cladding of Al0.5CoCrCuFeNiSi High Entropy Alloy Coating without and with Yttria Addition on H13 Steel

et al. 2020

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Al0.5CoCrCuFeNiSi high entropy alloy coating without and with a 1 wt.% Y2O3 addition was fabricated by laser cladding technique on H13 substrate. The results showed that the laser cladding coatings without and with Y2O3 addition consist of a mixture of body centered cubic (BCC) dendrites and face centered cubic (FCC) interdendrites. With the addition of Y2O3, the peaks of BCC dendrites in the coating shifted to leftwards, which is caused by the distortion of lattice due to the dissolution of Y with larger atomic radius. There exist cracks and porosities in the coating without Y2O3 addition. With Y2O3 addition, the cracks and porosities in the laser cladding coating were inhibited greatly. In addition, the microstructure of the coating with Y2O3 addition was refined due to the improving of the ratio of nucleation. The enhancement of properties, such as hardness, wear resistance and corrosion resistance, of the coating with Y2O3 addition came from the inhibition of cracks and porosities and the refinement of microstructure.

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Research on the microstructure and properties of a multi-pass friction stir processed 6061Al coating for AZ31 Mg alloy

Cited by 35 publications

References 29 publications

Dissimilar Friction Stir Lap Welding of Al to Mg: Characteristic Signal, Microstructure and Mechanical Properties

Dissimilar Friction Stir Lap Welding of Al to Mg: Characteristic Signal, Microstructure and Mechanical Properties

Refined Microstructure and Enhanced Hardness in Friction Stir-Welded AZ31 Magnesium Alloy Induced by Heat Pipe with Different Cooling Liquid

Laser Cladding of Al0.5CoCrCuFeNiSi High Entropy Alloy Coating without and with Yttria Addition on H13 Steel

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