Influence of annealing on stain hardening behaviour and fracture properties of a cryorolled Al 2014 alloy

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

“…4d), as inset image, clearly reveals the formation of continuous rings as compared to previous conditions, which gives an indication that recovery and recrystallisation processes have just started but not completed in this sample condition. [26]. In WR 170 samples, the UTS, YS and hardness are increased to 499 MPa, 457 MPa and 179 HV, respectively, while a reduction in ductility is observed as 9.5% as compared to the ST material.…”

Quasi <i>In-Situ</i> Study on Microstructure Evolution of Al 2014 Alloy during Thermal Deformation and Following Solution Treatment

“…Also, this alloy has excellent forge ability and can be used for complex components such as aircraft joint with thin rib. Most of the previous studies [3] [4] investigated on its hot deformation processing and heat treatment, but the seldom focused on the continuous microstructure evolution from thermal mechanical processing to the following solution treatment. In this study, quasi in-situ observation was adapted to analyze the details of microstructure evolution from hot compression to solution treatment, and to supply processing references for aluminum plates.…”

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

“…The high strength is ascertained to the development of UFG microstructure with high angle grain boundaries and high dislocation density in the specimen. Among the above processes, cryorolling has been recognized as one of the potential routes for producing UFG microstructures for ductile metals and alloys [1,[13][14][15][16], because the end product is generally sheet metal which has major applications in several industries [12,17]. The processing also requires relatively a lower load to induce severe strain [12].…”

“…In cryorolling, with increasing number of passes/cycles, dislocation density gradually increases and finally reaches to the highest steady state level at maximum deformed conditions. The oversaturated dislocations rearrange themselves within the deformed grains to develop dislocation substructures/subgrains, which subsequently produce ultrafine grained/nancrystalline (UFG/NC) materials with reduced ductility, formability and strain hardening [17,19].…”

“…The low ductility and inadequate strain hardening response of the UFG materials have limited their practical applications. Therefore, methods to improve their strain hardening ability are being given due importance by several researchers [1,[15][16][17][19][20]. Among several approaches, short-time annealing/ageing treatment reported to be an effective method to improve the ductility and strain hardening response of the UFG/NC materials by developing strain-free equiaxed fine grains to get high strength with good ductility.…”