Achieving microstructures prone to superplastic deformation in an Al–Zn–Mg–Cu alloy by equal channel angular pressing

Cepeda-Jiménez, C.M.; García-Infanta, J.M.; Ruano, Oscar Antonio; Carreño, Fernando

doi:10.1016/j.jallcom.2012.08.084

Cited by 31 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In ECAP process, deformation takes place by pure shear which leads to develop large magnitude of shear strain in the material and causes huge reduction in the grain size material [3]. In literature, numerous studies can be found on Al-Zn-Mg alloys subjected to various SPD processes; mainly related to the microstructure and mechanical properties [4][5][6]. In spite of that, wear study of the Al-Zn-Mg alloys processed by SPD have not gained much consideration.…”

Section: Introductionmentioning

confidence: 99%

Severe Plastic Deformation of Al-15Zn-2Mg Alloy: Effect on Wear Properties

Manjunath

Bhat

Kumar

2019

KEM

View full text Add to dashboard Cite

In the present work, Al-Zn-Mg alloy having highest zinc content was deformed by one of the severe plastic deformation (SPD) technique, equal channel angular pressing (ECAP) and effect of ECAP on the microstructure evolution and the wear properties were studied. ECAP was performed in a split die and the channels of the die are intersecting at an angle of 120º. ECAP was attempted at least possible temperature and the alloy was successfully ECAPed at 423 K. Below this temperature samples were failed in the first pass itself. After ECAP, significant drop in the grain size was reported. Also, ECAP leads to significant raise in the microhardness of the alloy. Predominantly, after ECAP, upsurge in the wear resistance of the alloy was noticed. To figure out the response of ECAP on the wear properties of the alloy; worn surfaces of the wear test samples were analyzed in SEM.

show abstract

Section: Introductionmentioning

confidence: 99%

Severe Plastic Deformation of Al-15Zn-2Mg Alloy: Effect on Wear Properties

Manjunath

Bhat

Kumar

2019

KEM

View full text Add to dashboard Cite

show abstract

“…The investigation for materials with a higher strength-to-weight ratio is one of the main topics in metal research and industry. Severe plastic deformation (SPD) techniques have arrived at a wide range of attention for producing bulk ultrafine-grained(UFG) materials [1][2][3][4][5]. Ultrafine-grained materials possess unusual and extraordinary mechanical properties and Hall-Petch relationship is holds good for these materials.…”

Section: Introductionmentioning

confidence: 99%

Equal Channel Angular Extrusion of AA 5083

Babu

Naidu

Sateesh³

2018

AMR

View full text Add to dashboard Cite

Equal Channel Angular Extrusion (ECAE) is used as a top down process to produce bulk nano/ultrafine grain structured materials by inducing high amount of strain with less experimental set up. In the present study AA 5083 alloy with circular and square cross sections are extruded at room temperature using two dies having cannels with circular and square cross sections respectively. Both the dies used in this study are having same channel angle (Φ)1200 and outer corner angle (Ψ) 200. The circular and square billets are extruded for four times in route BC. The objective of this work is to study the effect of cross section of the billet, number of passes on grain refinement, mechanical properties and wear behaviour of AA 5083. Significant reduction in grain size is observed in extruded material using Field Emission Scanning Electron Microscope (FE-SEM) in the range of 80nm to 600nm after four passes. The microhardness in extruded materials is improved with no. of passes in both cross sectioned billets and it is more predominant for square billets even after two passes. The effect of dead zone is less in case of square billets and hence they have shown more structural homogeneity. The dry sliding wear tests are conducted to study the wear behaviour of the ECAEd materials. It is observed that the wear rate and coefficient of friction are reduced with number of passes in both the cases and rate of decrease is more in case of square billets.

show abstract

“…And better superplasticity could be achieved with the decrease of the grain size [23]. Moreover, it is reasonable to consider that the high proportion of HAGBs with random crystallographic orientations was prone to superplastic behavior [24]. In the present work, the FSPed heat-treated Ti-6Al-4V alloy shows a large proportion of HAGBs of 89.3% with random crystallographic orientation, which promoted the achievement of GBS and further resulted in the achievement of the present superior LTSP with an elongation of 1220% observed at 1×10 -3 s -1 and 650 ℃.…”

mentioning

confidence: 99%

Effect of Initial Microstructure on Grain Refinement and Enhanced Low Temperature Superplaticity in Friction Stir Processed Ti-6Al-4V Alloy

Zhang

Hua

Yang

et al. 2018

DDF

View full text Add to dashboard Cite

Ti-6Al-4V alloy sheet with two kinds of initial microstructure (base material (BM) and heat-treated material) was subjected to friction stir processing (FSP). These two kinds of friction stir processed (FSPed) materials show similar characteristics that the microstructure exhibited equiaxed ultrafine-grained (UFG) structure with high fraction of high angle grain boundaries (HAGBs) and random crystallographic orientations. Furthermore, slightly finer grains were observed in FSPed heat-treated material than that in FSPed BM. Superplastic tensile tests were conducted utilizing the FSPed heat-treated material in the strain rates range from 1×10-2 to 1×10-4 s-1 at 650°C, and the optimal superplasciticy with an elongation of 1220% was achieved at 1×10-3 s-1. The superplastic deformation mechanism appears to be grain boundary sliding.

show abstract

Achieving microstructures prone to superplastic deformation in an Al–Zn–Mg–Cu alloy by equal channel angular pressing

Cited by 31 publications

References 47 publications

Severe Plastic Deformation of Al-15Zn-2Mg Alloy: Effect on Wear Properties

Severe Plastic Deformation of Al-15Zn-2Mg Alloy: Effect on Wear Properties

Equal Channel Angular Extrusion of AA 5083

Effect of Initial Microstructure on Grain Refinement and Enhanced Low Temperature Superplaticity in Friction Stir Processed Ti-6Al-4V Alloy

Contact Info

Product

Resources

About