Comparison of Microstructure, Texture, and Mechanical Properties of TZ61 and AZ61 Mg Alloys Processed by Differential Speed Rolling

Abstract

In this work, the comparison of microstructure, texture, and mechanical properties of the newly developed TZ61 (Mg-6Sn-1Zn) alloy with the commercially available AZ61 (Mg-6Al-1Zn) has been presented. Both analyzed Mg alloys were processed by conventional symmetric and asymmetric rolling (i.e., Differential Speed Rolling—DSR). The microstructure and texture were examined by EBSD and XRD, whereas the mechanical behavior was investigated by uniaxial tensile tests. DSR processing led to more effective grain refinement of both TZ61 and AZ61 sheets. However, a high fraction of Mg2Sn phase precipitates in the TZ61 sheets hindered grain growth what resulted in their smaller grain size as compared to AZ61 sheets. DSR processing lowered also the basal texture intensity in the TZ61 and AZ61 sheets. A unique basal poles splitting was observed for the as-rolled TZ61 alloy, while AZ61 alloy exhibited a typical single-peak basal texture. Finally, the reduced grain size and weakened basal texture by DSR processing caused increase of plasticity of the annealed TZ61 and AZ61 sheets. Nevertheless, the annealed AZ61 sheets showed higher uniform elongation and strength (as compared to TZ61 ones), which has been attributed to their significantly lower texture intensity and greater ability to strain hardening.

Analysis of the Asymmetrical Rolling of Ultra-Thin Strips Considering Elastic Deformation of the Strips

“…Roll pressures are substituted into Equations ( 24)- (26). Integration gives the roll force per unit width for different deformation region states as follows:…”

“…Xiao et al [25] employed asymmetrical rolling to refine grains in order to investigate the mechanical properties of pure titanium foils. By comparing the microstructure, texture, and mechanical properties of TZ61 and AZ61, Majchrowicz et al [26]. found that the plasticity of annealed TZ61 and AZ61 sheets increased because of the reduced grain size and weakened basal texture caused by the asymmetric rolling process.…”

Microstructure Evolution and Recrystallization of Ti6246 Alloy in Hot‐Rolling and Annealing Processes

“…Due to the various excellent properties such as high specific strength, good corrosion resistance, superior stability in broad temperature range, and good weldability, titanium and titanium alloys have been widely used as important structural materials in aerospace, marine, biomedical engineering, and other high-tech fields. [1][2][3][4][5][6] Two-phase titanium alloys, such as Ti-6Al-4 V, Ti-6.5Al-2Zr-1Mo-1 V, and Ti-5Al-2Sn-2Zr-4Mo-4Cr, are mainly composed of low-temperature stable α phase and hightemperature stable β phase. [7] Ti-6Al-2Sn-4Zr-6Mo (Ti6246) is also a typical α þ β two-phase titanium alloy, which was developed in the United States in the 20th century by modifying the Ti-6Al-2Sn-4Zr-2Mo alloy.…”

Comprehensive Research of FSW Joints of AZ91 Magnesium Alloy

“…Mg is strengthened by additives [3][4][5], heat, and plastic treatment [6], e.g., ECAP technology [7,8]. Numerous alloys are formed based on a Mg matrix, and the most frequently tested magnesium alloys include AZ31, ZE41, AZ61, AM60, AZ61, AZ80, and AZ91 [9][10][11][12][13][14][15][16][17]. The most common methods used to produce elements from Mg alloys are cast, die-cast [18], cast-rolling [19], rolling [20], squeeze cast [21], and extrusion [10,22,23].…”