A study on cryogenic temperature ECAP on the microstructure and mechanical properties of Al–Mg alloy

Enhancement of mechanical properties of low stacking fault energy brass processed by cryorolling followed by short-annealing

“…Recently, Bahmanpour et al [16] also reported that the cryorolled samples normally do not show clearly defined grain boundaries and mainly containing high dislocation density. The high density dislocations could act as the sites for recrystallization to produce fine grains structure during low temperature annealing/ageing [32].…”

Microstructural evolution and mechanical properties of low SFE Cu-Al alloys processed by cryorolling followed by short-annealing

“…Yu et al [11] studied the effect of asymmetric cryorolling+ageing to produce UFG structure in Al 6061 and reported that both the tensile strength and ductility increased due to the thickness effect and micro-defects surrounding secondary phase particles. Very high YS was reported in Al-Mg alloy processed by cryo-ECAP [7]. The high strength is ascertained to the development of UFG microstructure with high angle grain boundaries and high dislocation density in the specimen.…”

“…The ultrafine grained alloys in bulk size can be produced through several severe plastic deformation (SPD) techniques such as high pressure torsion (HPT) [5], equal channel angular pressing (ECAP) [6,7], accumulative roll bonding (ARB) [8], equal channel angular rolling [9], cryoforging [10], asymmetric cryorolling [11] and cryorolling [12]. Deformation at cryogenic temperature has emerged as a potential route to develop ultrafine grained (UFG) material with improved mechanical properties.…”

“…Deformation at cryogenic temperature has emerged as a potential route to develop ultrafine grained (UFG) material with improved mechanical properties. The formation of UFG microstructures in various Cu and Al alloys has been investigated by many researchers [1,7,[10][11][12] through various techniques such as asymmetric cryorolling, cryo-ECAP, cryoforging, cryorolling etc. Yu et al [11] studied the effect of asymmetric cryorolling+ageing to produce UFG structure in Al 6061 and reported that both the tensile strength and ductility increased due to the thickness effect and micro-defects surrounding secondary phase particles.…”

A Comparative Study on Tensile and Fracture Behavior of Al–Mg Alloy Processed Through Cryorolling and Cryo Groove Rolling

“…Severe plastic deformation (SPD) is one of the novel thermo-mechanical processing techniques used for producing ultrafine grain microstructure (UFG) with superior mechanical properties in ferrous and non-ferrous alloy [2]. SPD techniques such as Accumulative roll bonding (ARB) [3][4][5][6][7][8][9], Equal channel angular pressing (ECAP) [10][11][12][13][14][15][16], Multi-axial forging (MAF) [17][18][19][20][21], Repetitive corrugation and straightening (RCS) [22][23][24][25][26][27], High-pressure torsion (HPT) [28][29][30][31][32][33][34], are routinely used for producing ultrafine grain materials; however, the limitations associated with these techniques for largescale products are due to requirement of severe plastic strain of the order of 5 or 6 at ambient or elevated temperatures, expensive tooling, and design difficulties. Hence, they are confined to mainly for producing smalllength scale products.…”