Cast and age hardening behaviour of Al6061 alloy reinforced with an in-situ ceramic composite prepared by carbo thermal reduction of fly ash in plasma reactor

Abstract

An in-situ ternary ceramic composite material is developed indigenously by carbo thermal reduction of fly ash in a plasma reactor. X-ray diffraction (XRD), Scanning electron microscopy (SEM)-Energy dispersive x-ray (EDX) analyses of the developed ternary mixture has revealed in-situ conversion of SiO₂ to SiC in the vicinity of Al₂O_3, present in the fly ash material. Presence of carbon in the form of graphite is also confirmed by XRD and EDX analyses. The morphology of the fly ash powder particles is changed from irregular to rod shaped particles with the presence of whiskers (diameter ∼ 0.2 µm, length 8–20 µm). Metal matrix based (Al6061) ceramic composites are prepared with the plasma synthesized fly ash and untreated fly ash composites by stir casting method with different volume fractions of ceramic powders of both the category. Progressive reductions of grain size by increasing volume fractions with segregation of ceramic particles at the grain boundaries are salient features of microstructures. Remarkable improvement in strength and wear resistance is the two significant features of the novel Al6061alloy based composite developed with plasma treated fly ash. Results are presented on the ageing behaviour of the alloy composite for both the categories and mechanical properties of age hardened alloy based composites are compared with monolithic alloy. Accelerated ageing behaviour is observed for alloy based composites, which is found to depend on the morphology of the incoherent dispersed phases. Accelerated precipitation during ageing has been confirmed by hardness versus time as well as by differential scanning calorimetry analysis. Sequences of precipitation for all materials are shown in differential scanning calorimetry thermogram.

Keywords

Aluminium alloys age hardening composite hardness differential scanning calorimetry wear

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References

Herling

Grant

Hunt

. Low cost aluminium metal matrix composites. Adv Mater Process 2001; 159: 37–43.

Jiang

Tan

. Dry sliding wear behaviour of Al₂O₃–Al composites produced by centrifugal force infiltration. Mater Sci Technol 1996; 12: 483–488.

Ejiofor

Reddy

. Developments in the processing and properties of particulate Al-Si composites. JOM 1997; 49: 31–37.

Hasson

Hoover

Crowe

. Effect of thermal treatment on the mechanical and toughness properties of extruded SiCw/aluminium 6061 metal matrix composite. J Mater Sci 1985; 20: 4147–4154.

Lee

Park

. Thermal residual stress investigation in AS52/Al18B4O33 magnesium matrix composite by thermal cycling test. Arch Mater Sci Eng 2008; 32: 17–20.

Rohatgi

Guo

Iksan

. Pressure infiltration technique for synthesis of aluminum–fly ash particulate composite. Mater Sci Eng A 1998; 244: 22–30.

Rohatgi

Guo

Keshevaram

. Cast aluminium fly ash composites for engineering applications. Trans AFS 1995; 103: 575–579.

Kumar

PRS

Kumaran

Srinivasa Rao

. Studies on Al6061-Flyash composites produced by press and extrusion approach. Trans PMAI 2009; 35: 47–53.

Bienia

Walczak

Surowska

. Microstructure and corrosion behavior of aluminium fly ash composites. J Opt Adv Mater 2003; 5: 493–502.

10.

Rohatgi

Gajdardziska-Josifovska

Robertson

. Age-hardening characteristics of aluminum alloy–hollow fly ash composites. Metall Mater Trans A 2002; 33: 1541–1547.

11.

Benal

Shivanand

. Effects of reinforcements content and ageing durations on wear characteristics of Al (6061) based hybrid composites. Wear 2007; 262: 759–763.

12.

Yong

Langdon

. Creep behaviour of an Al6061 metal matrix composite reinforced with Al6061metal matrix composite reinforced with alumina particulates. Acta Mater 1997; 45: 4797–4806.

13.

Manjunatha

Dinesh

. Studies on effect of heat treatment and water quench age hardening on microstructure, strength, abrasive wear behaviour of Al6061-MWCNT metal matrix composites. J Acad Indus Res 2013; 1: 4797–4806.

14.

Melby

Nayak

. Aging Behaviour of 6061 Al-15vol% SiC composite in T4 and T6 Treatments. Int J Chem Nuclear Metall Mater Eng 2014; 8: 198–201.

15.

Soheil

Farshad

. Effect of SiC content on the processing, compaction behavior, and properties of Al6061/SiC/Gr hybrid composites. J Mater Sci 2011; 46: 1502–1511.

16.

Seyed Reihani

. Processing of squeeze cast Al6061–30vol% SiC composites and their characterization. Mater Des 2006; 27: 216–222.

17.

Guo

Rohatgi

Nath

. Preparation of aluminium-fly ash particulate composite by powder metallurgy technique. J Mater Sci 1997; 32: 3971–3974.

18.

Badini

Marino

Verne

. Calorimetric study on precipitation path in 2024 alloy and its SiC composite. Mater Sci Eng A 1995; 191: 185–191.

19.

Sannino

Rack

. Effect of reinforcement size on age hardening of PM 2009 Al-SiC 20 vol% participate composites. J Mater Sci 1995; 30: 4316–4322.

20.

Verma

Salas

Corral

. Microstructural development during aging of 2014 aluminum alloy composite. J Mater Sci 1999; 34: 1855–1863.

21.

Papazian

. Effects of SiC whiskers and particles on precipitation in aluminum matrix composites. Metall Mater Trans A 1988; 19: 2945–2953.

22.

Dutta

Bourell

. A theoretical and experimental study of aluminum alloy 6061-SiC metal matrix composite to identify the operative mechanism for accelerated aging. Mater Sci Eng A 1989; 112: 67–77.

23.

Unsworth

Bandyopadhya

. Effect of thermal ageing on hardness, tensile and impact properties of an alumina microsphere-reinforced aluminium metal-matrix composite. J Mater Sci 1994; 29: 4645–4650.

24.

Gaohui

Senlin

Yongchun

. Suppression effect of fine Al2O3 particulates on ageing kinitics in a 6061 matrix composite material. Trans Nonferrous Met Soc China 1999; 9: 818–821.

25.

Venkata Siva

Sahoo

Ganguly

. Preparation of aluminium metal matrix composites with a novel in-situ ceramic composite particulates developed from waste colliery shale material. Metall Mater Trans B 2013; 44: 800–808.

26.

Chen

Wang

. Size effects in the Particle-reinforced metal matrix composites. Acta Mech 2002; 157: 113–127.

27.

Yueguang

. Particulate size effects in the particle-Reinforced metal matrix composites. Acta Mech Sin 2001; 17: 45–58.

28.

Admile

Kulkarni

Sonawane

. Review on mechanical and wear behavior of aluminum-fly Ash metal matrix composite. Int J Emer Tech Adv Eng 2014; 4: 863–866.

29.

Bhandakkar

Prasad

Sastry

SML

. Elastic plastic fracture toughness of aluminium alloy AA6061 fly ash composites. Adv Mater Lett 2014; 5: 525–530.

30.

Chen

Mussert

Van Der Zwaag

. Precipitation kinetics in Al6061 and in an Al6061-alumina particle composite. J Mater Sci 1998; 33: 4477–4483.

31.

Miao

Laughlin

. Effects of Cu content and preaging on precipitation characteristics in aluminum alloy 6022. Metall Mater Trans A 2000; 31: 361–371.

32.

Wang

Furukawa

Horita

. The age-hardening characteristics of an AI-6061/AI₂O₃ metal matrix composite. Metall Mater Trans A 1995; 26: 581–587.

33.

Dutta

Surappa

. Studies on age-hardening characteristics of ceramic particle/matrix interfaces in Al–Cu–SiC_p composites using ultra low-load-dynamic microhardness measurements. J Mater Res 1997; 12: 2773–2778.

34.

Suresh

Christman

Sugimura

. Accelerated Aging in Cast Al Alloy-SiC Particulate Composites. Scr Metall 1989; 23: 1599–1602.

35.

Sharma

. Phase transformation in materials, 2nd edn. Delhi, India: CBS, 2002. P100.

36.

Dutta

Bourell

Latimer

. A theoretical investigation of accelerated aging in metal-matrix composites. J Compo Mater 1988; 22: 829–849.

37.

Venkata Siva

Shoo

Gangly

. Effect of hot working on structure and Tribological properties of aluminium reinforced with aluminium particulates. J Mater Eng Perform 2012; 21: 1226–1231.

38.

Ted Guo

Tsao

CYA

. Tribological behavior of self-lubricating aluminium/SiC/graphite hybrid composites synthesized by the semi-solid powder densification method. Compos Sci Technol 2000; 60: 65–74.

39.

Dutta

Allen

Hafley

. Effect of reinforcement on the aging response of cast 6061 Al-Al₂O₃ particulate composites. Metall Mater Trans A 1991; 22: 2553–2563.

40.

Badini

Marino Tomasi

. Kinetics of precipitation hardening in SiC whisker-reinforced 6061 aluminium alloy. J Mater Sci 1991; 26: 6279–6287.

41.

Rohatgi

Guo

Huang

. Friction and abrasion resistance of cast aluminum alloy-fly ash composites. Metall Mater Trans A 1997; 28: 245–250.