Effect of aging treatment on heavily deformed microstructure of a 6061 aluminum alloy after equal channel angular pressing

Kim, J.K; Jeong, Hye-Jin; Hong, Sung-Tae; Kim, Y.S; Kim, W.J

doi:10.1016/s1359-6462(01)01109-5

Cited by 204 publications

(93 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Second, an aluminum alloy in a condition of supersaturated solid solution produced by initial water or oil quenching is processed by ECAP at a temperature below, equal to or slightly higher than the aging temperature (Figure 1b). Finally, the processed alloy is subjected to artificial aging [6][7][8][9]17,19,21,[25][26][27]. This is the most popular TMP route.…”

Section: Ecap Processing Of Age Hardenable Aluminum Alloysmentioning

confidence: 99%

“…High YS originated from a combination of dislocation strengthening and dispersion strengthening. However, the total elongation decreases by almost a factor of two [6][7][8][9]17,21,26,27]. Decreased ductility is attributed to low work-hardening rate [6].…”

Section: Ecap Processing Of Age Hardenable Aluminum Alloysmentioning

confidence: 99%

“…Therefore, the deformed structure resulting from these TMP routes could not be interpreted in terms of UFG structure [1]. Careful inspection of structural characterization data [6,8,9,17,19,23,26] showed that, for the most part, crystallites evolved under ECAP are delimited by low-angle boundaries (LAGBs); under SPD, the lattice dislocations arrange into cells and LAGBs or form the dislocation network within initial grains [17]. Therefore, it is not obvious that the grain size strengthening is important for significant increase in YS of aluminum alloys subjected to ECAP through the three aforementioned TMP routes.…”

Section: Ecap Processing Of Age Hardenable Aluminum Alloysmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

Mogucheva

Kaibyshev

2016

Metals

View full text Add to dashboard Cite

Abstract:The effect of post-deformation solution treatment followed by water quenching and artificial aging on microstructure and mechanical properties of an Al-Li-Mg-Sc-Zr alloy subjected to equal-channel angular pressing (ECAP) was examined. It was shown that the deformed microstructure produced by ECAP remains essentially unchanged under solution treatment. However, extensive grain refinement owing to ECAP processing significantly affects the precipitation sequence during aging. In the aluminum-lithium alloy with ultrafine-grained (UFG) microstructure, the coarse particles of the S 1 -phase (Al 2 LiMg) precipitate on high-angle boundaries; no formation of nanoscale coherent dispersoids of the δ -phase (Al 3 Li) occurs within grain interiors. Increasing the number of high-angle boundaries leads to an increasing portion of the S 1 -phase. As a result, no significant increase in strength occurs despite extensive grain refinement by ECAP.

show abstract

Section: Ecap Processing Of Age Hardenable Aluminum Alloysmentioning

confidence: 99%

Section: Ecap Processing Of Age Hardenable Aluminum Alloysmentioning

confidence: 99%

Section: Ecap Processing Of Age Hardenable Aluminum Alloysmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

Mogucheva

Kaibyshev

2016

Metals

View full text Add to dashboard Cite

show abstract

“…After ECAP, the material was peak-aged at 140 °C for 360 min to optimize the ductility. With this combined treatment of ECAP and aging, both elevated strength and moderate ductility can be achieved [30,31].…”

Section: Methodsmentioning

confidence: 99%

Influence of Particulate Reinforcement and Equal-Channel Angular Pressing on Fatigue Crack Growth of an Aluminum Alloy

Köhler

Hockauf²,

Lampke³

et al. 2015

Metals

View full text Add to dashboard Cite

Abstract:The fatigue crack growth behavior of unreinforced and particulate reinforced Al 2017 alloy, manufactured by powder metallurgy and additional equal-channel angular pressing (ECAP), is investigated. The reinforcement was done with 5 vol % Al2O3 particles with a size fraction of 0.2-2 µm. Our study presents the characterization of these materials by electron microscopy, tensile testing, and fatigue crack growth measurements. Whereas particulate reinforcement leads to a drastic decrease of the grain size, the influence of ECAP processing on the grain size is minor. Both reinforced conditions, with and without additional ECAP processing, exhibit reduced fatigue crack growth thresholds as compared to the matrix material. These results can be ascribed to the well-known effect of the grain size on the crack growth, since crack deflection and closure are directly affected. Despite their small grain size, the thresholds of both reinforced conditions depend strongly on the load ratio: tests at high load ratios reduce the fatigue threshold significantly. It is suggested that the strength of the particle-matrix-interface becomes the critical factor here and that the particle fracture at the interfaces dominates the failure behavior.

show abstract

“…Las distintas combinaciones existentes entre el procesado por ECAE y el tratamiento previo o posterior de precipitación, son tratadas en estudios como el de Kim y Jeong [13] o el de Kim y Wang [14] , que justifican siempre que el tratamiento de precipitación se realice tras el procesado de las probetas.…”

Section: Introductionunclassified

Análisis de la influencia del tratamiento térmico de envejecimiento en la modificación de las propiedades mecánicas de la aleación AA6060 procesada por ECAE

Pérez¹,

Luis-Pérez²,

Luri³

et al. 2011

REVMETAL

View full text Add to dashboard Cite

ResumenEn el presente trabajo se ha realizado un estudio de la modificación de las propiedades mecánicas de la aleación de aluminio AA6060 F, al ser deformada mediante deformación plástica severa empleando el proceso de extrusión en canal angular (ECAE). Asimismo, se ha efectuado un estudio del efecto del envejecimiento artificial sobre la modificación de dichas propiedades mecánicas. Para ello, se han realizado tratamientos térmicos a diferentes temperaturas y tiempos de permanencia, efectuando mediciones de dureza, ensayos de tracción, ensayos con péndulo Charpy y técnicas de revelado metalográfico, para conocer los comportamientos mecánicos y el estado del material. Existe un elevado número de publicaciones, que han analizado el efecto de tratamientos térmicos de envejecimiento en aleaciones de la serie 6000. Sin embargo, la aleación AA6060 no ha sido tan ampliamente estudiada. Por ello, en este trabajo se parte de una aleación comercial AA6060 en estado de bruto de colada, lo cual no ha sido estudiado hasta la fecha. Palabras claveECAE; SPD; Envejecimiento; Aluminio; UFG. Analysis of the influence of aging heat treatment on the modification of the mechanical properties of the alloy AA6060 processed by ECAE AbstractIn the present work, a study on the modification of the mechanical properties of the aluminium alloy AA6060 F has been made when severe plastic deformation is applied to it through Equal Channel Angular Extrusion (ECAE). Moreover, a study about the effect of the artificial aging on the modification of such mechanical properties has been carried out after having processed the material by ECAE. In order to do this, thermal treatments at different values of temperature and holding time have been performed. Hardness, tensile tests and Charpy impact test, along with metallographic techniques, have been carried out in order to analyse the mechanical behaviour and the state of the material. In spite of the existence of several studies that have analysed the effect of aging thermal treatments on 6000 aluminium alloys, such studies are focused on laboratory alloys with industrial compositions not very usual. Therefore, in the present work, the employed starting material is a commercial alloy as-cast, which has not been studied up to now.

show abstract

Effect of aging treatment on heavily deformed microstructure of a 6061 aluminum alloy after equal channel angular pressing

Cited by 204 publications

References 14 publications

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

Microstructure and Mechanical Properties of an Al-Li-Mg-Sc-Zr Alloy Subjected to ECAP

Influence of Particulate Reinforcement and Equal-Channel Angular Pressing on Fatigue Crack Growth of an Aluminum Alloy

Análisis de la influencia del tratamiento térmico de envejecimiento en la modificación de las propiedades mecánicas de la aleación AA6060 procesada por ECAE

Contact Info

Product

Resources

About