Effect of Stretch Orientation and Rolling Orientation on the Mechanical Properties of 2195 Al-Cu-Li Alloy

Abstract

Sheets of 2195 aluminum-lithium alloy were solution-treated at 507°C for 30 min. One set was stretched to 3-5% in the 0°, 45°, and 90°angle with respect to the original rolling direction. Two other sets were rolled 6% reduction in thickness and 24% reduction in thickness in the 0°, 45°, and 90°angle with respect to the original rolling direction. All specimens were aged at 143°C for 36 h. A second group of samples was rolled at 24 and 50% reduction in thickness after a solution treatment of 507°C for 1 h prior to aging at 190°C for 24 h. Tensile specimens were machined from each sheet at 0°, 45°, and 90°angles to the original grain orientation. Tensile testing was used to determine the mechanical properties and anisotropic behavior of each condition. Rolling 6% reduction in thickness in the 45°orientation yielded anisotropy of 7.6% in the yield strength.

The Effect of Thermal Exposure on the Microstructures and Mechanical Properties of 2198 Al–Li Alloy

“…It generally reduces the mechanical anisotropy of Al-Li sheets by the incorporation of off-axis stretching/ rolling prior to aging. [19,20] The tensile properties in the longitudinal and transversal direction are measured before and after exposure at 300 and 500 C. The tensile properties evaluated with samples oriented differently with respect to the rolling direction are given in Figure 10. As can be seen in figures, the as-received sheet does not present strong anisotropy.…”

Strengthening mechanisms, deformation behavior, and anisotropic mechanical properties of Al-Li alloys: A review

“…Besides, the cost of Al-Li alloys is higher than that of traditional Al alloys because of the ageing conditions and comparable strength. Therefore, various studies have been carried out to investigate metal forming technologies (i.e., hydroforming, impact hydroforming, stamping, bending, and superplastic forming) under different working conditions (i.e., cold, warm, and hot deformation) to identify an alternative manufacturing route and to optimize the working conditions to decrease the higher costs related to the addition of Li and the manufacturing of sound, complex shape components from Al-Li alloys [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] .…”

The Effect of Incomplete Solution Treatment on the Tensile Behavior and Mechanical Anisotropy of 2195 Aluminum Lithium Alloy

“…Fig. 2 shows the experimental procedure [20]. This procedure was repeated for both the samples designated as "full" and "incomplete".…”

“…Es-Said et al [20] studied in more detail the effects of stretch orientation and rolling orientation on the mechanical anisotropy behavior of the 2195 Al-Cu-Li alloy. The experiments were duplicated in this study with an incomplete (short time) solution treatment.…”

“…The objective was to study the effect of the incomplete solution treatment on the tensile properties and anisotropy values. These values will be designated as "incomplete" and will be quantitatively compared to those which were properly solution heat-treated [20]. The latter will be designated as "full".…”