Fatigue Behavior of Ultrafine-Grained 5052 Al Alloy Processed Through Different Rolling Methods

Development of High Performance of Al Alloys via Cryo‐Forming: A Review

“…AA5XXX, as a strain‐strengthening alloy, exhibited excellent deformability in CR and the total strain accumulation was more than 90%. [ 59 ] AA7XXX have a higher requirement for deformation conditions due to their relatively poorer plasticity. However, the research by Panigrahi et al [ 37 ] showed that AA7075 could achieve large plastic deformation with liquid nitrogen cooling (true strain up to 3.4).…”

“…Other cooling methods, such as using liquid nitrogen atmosphere or using the combination of liquid nitrogen and water as immersion liquid, were also reported. [ 59,65 ] Panigrahi et al [ 70 ] studied the mechanical properties of cryorolled AA6063 alloy with different immersion durations, and found that both the hardness and the yield strength (YS) of the cryorolled AA6063 alloy were significantly increased when the immersion duration increased from 5 to 20 min, while these properties remained unchanged for 30 min immersion. Following this research, the immersion time was set from 8 to 30 min by previous studies [ 26,71 ] to suit the dimensions of different specimens.…”

“…Based on CR and ACR, some new rolling methods have been proposed in recent years. Yogesha [ 59 ] found that the cryo‐groove rolling followed by warm rolling could notably improve the high‐cycle fatigue strength of AA5052. Cui et al [ 80 ] proposed that a combination of multipass CR with certain annealing treatment would achieve the optimum mechanical properties of AA8011.…”

“…Pathak [ 97 ] believed that CR + warm rolling can improve the grain boundary strengthening and dynamic ageing effect of AA2014 during tensile deformation, therefore improving the strength and toughness. Yogesha [ 59 ] found that the AA5052 presented better UTS and fatigue strength through cryo‐groove rolling followed by warm rolling because of the presence of small subgrains of an average size 125 nm. Yu et al found [ 31 ] that ARB and subsequent CR led to improved strength compared with original ARB due to the improved fraction of high‐angle boundaries (HAB) and elongated grains.…”

Mechanical Properties and Microstructural Evolution of Bulk UFG Al 2014 Alloy Processed Through Cryorolling and Warm Rolling

“…The mechanical properties of this alloy can further be improved by reducing the grain size less than 1 lm [4]. It is reported that the grain size of the metals/alloys plays a significant role in achieving the superior mechanical, fatigue and fracture properties of polycrystalline metals/alloys [5][6][7]. In the past few decades, some of severe plastic deformation (SPD) methods like multidirectional forging (MDF) [8], continuous repetitive corrugating and straightening (CRCS) [9], asymmetric rolling (AR) [10], cross-rolling [11], hot pressing [12] and equal channel angular pressing (ECAP) [13] have been developed to produce ultrafine grain (UFG) materials, in which the grain size lies between 100 nm and 1 lm.…”