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Friction and Wear Properties of T6 Treatment And As-Plated Duplex NiP/NiB Coatings on Az91d Magnesium Alloy

Year 2019, Volume: 6 Issue: 1, 31 - 42, 31.01.2019
https://doi.org/10.31202/ecjse.450204

Abstract





Akımsız
nikel kaplamalar iyi bir kayganlık özelliğine sahip, ateşli silahlar gibi aşınmaya   dayanıklı uygulamalarda tercih edilebilir.
Bu çalışmada yaygın olarak kullanılan AZ91D magnezyum alaşımı, hem döküm hem
de çökelme şertleşmesi koşullarında, akımsız kaplama metodu ile dublex
Ni-P/Ni-B kaplamalar ile kaplanmıştır. Alaşımın çözelti işlemi 415
°C’de 22 saat boyunca grafit tozu içerisinde gerçekleştirildi,
ardından 25°C suda soğutuldu. Çözelti işlemine alınmış numunelerin
yaşlandırma işlemi (T6) 216°C’de 6 saat boyunca gerçekleştirildi. Elde edilen
kaplamaların mikroyapıları, elementel dağılımları ve faz analizleri taramalı
elektron mikroskobu (SEM), enerji dağılım spektrometresi (EDS) ve X-ışınları
difraksiyon analizi (XRD) ile karakterize edildi. XRD analizine göre, elde
edilen kaplamalar amorf karaktere sahiptir ve bunun ardından numuneye
350°C’de bir kristalizasyon işlemi gerçekleştirildi. Kaplamanın sürtünme ve
aşınma özellikleri, ball-on-disc vasıtasıyla deneyler alümina topa karşılık
0,1 m/s kayma hızında, 10N yük altında oda sıcaklığında çalışıldı. Numunenin
sürtünme katsayısı, sürtünme katsayısı-mesafe grafiklerinden birbirleriyle
karşılaştırıldı. Aşınma oranları, 3D optik profilometre (3D-OM) ile izin
derinliği ölçülerek tespit edildi. Aşınma izlerinin karakterizasyonu SEM ve
EDS ile gerçekleştirilmiştir.


References

  • References
  • [1] N.N. AUNG,W. ZHOU, ‘Effect of heat treatment on corrosion and electrochemical behavior of AZ91D magnesium alloy’ journal of Applied Electrochemistry 32 1397–1401, 2002.
  • [2] Fatemeh Madah, Ahmad Ali Amade, Changiz Dehghanian, ‘Investigation on the phase transformation of electroless Ni -B coating after dry sliding against alumina ball’ Journal of Alloys and Compounds 658 (2016) 272
  • [3] E. Correa, A.A. Zuleta, L. Guerra, M.A. Gómez, J.G. Castaño, F. Echeverría , H. Liu, A. Baron-Wieche,T. Hashimoto , P. Skeldon, G.E. Thompson’Coating development during electroless Ni –B plating on magnesium and AZ91D alloy’ Surface & Coatings Technology 232 (2013) 784
  • [4] Prasanta Sahoo, Suman Kalyan Das, ‘Tribology of electroless nickel coatings – A review’, Materials and Design 32 (2011) 1760
  • [5] E. Correa, A.A. Zuleta, L. Guerra, M.A. Gómez, J.G. Castaño, F. Echeverrí, H. Liu, P. Skeldon, G.E. Thompson ‘Tribological behavior of electroless Ni-B coatings on magnesium and az91d alloy’, Wear,305(2013) 115-123

T6 Işlem Görmüş ve Döküm Az91d Magnezyum Alaşımı Üzerine Dublex Nip/Nib Kaplamaların Sürtünme ve Aşınma Özellikleri

Year 2019, Volume: 6 Issue: 1, 31 - 42, 31.01.2019
https://doi.org/10.31202/ecjse.450204

Abstract



Electroless nickel coatings
can be   preferred in wear resistant
applications like firearms with good lubricity properties. In this study, a
widely-used magnesium alloy, AZ91D both as-cast and precipitation-hardened
conditions were coated with nickel phosphorus/nickel boron duplex coatings by
the electroless deposition method. Solution treatment (W) of the alloy was
carried out at 415 °C for 22 h in carbon powder followed by water quenched at
25 °C. Aging treatment (T6) of the
solution-treated samples was performed at 216 °C for 6 h. The microstructures,
elemental distributions and phase analysis of the obtained coatings were
characterized by scanning electron microscopy (SEM), energy dispersive X-ray
spectrometry (EDS) and X-ray diffraction (XRD) analysis. According to the XRD
analysis, the obtained coatings have an amorphous character and subsequent to
this, a crystallization process to the sample is carried out at 350 °C. The
friction and wear properties of the coating are studied by means of
ball-on-disc experiments at room temperature under 10N applied loads at 0.1 m/s
sliding speed using alumina balls as counterparts. The friction coefficient of
the sample was compared with each other from friction coefficient-distance
graphics. The wear rates were determined by measuring the depth of the track
with an 3D-optical microscope (3D-OM).
Characterization of the wear tracks
was performed by SEM and EDS.




References

  • References
  • [1] N.N. AUNG,W. ZHOU, ‘Effect of heat treatment on corrosion and electrochemical behavior of AZ91D magnesium alloy’ journal of Applied Electrochemistry 32 1397–1401, 2002.
  • [2] Fatemeh Madah, Ahmad Ali Amade, Changiz Dehghanian, ‘Investigation on the phase transformation of electroless Ni -B coating after dry sliding against alumina ball’ Journal of Alloys and Compounds 658 (2016) 272
  • [3] E. Correa, A.A. Zuleta, L. Guerra, M.A. Gómez, J.G. Castaño, F. Echeverría , H. Liu, A. Baron-Wieche,T. Hashimoto , P. Skeldon, G.E. Thompson’Coating development during electroless Ni –B plating on magnesium and AZ91D alloy’ Surface & Coatings Technology 232 (2013) 784
  • [4] Prasanta Sahoo, Suman Kalyan Das, ‘Tribology of electroless nickel coatings – A review’, Materials and Design 32 (2011) 1760
  • [5] E. Correa, A.A. Zuleta, L. Guerra, M.A. Gómez, J.G. Castaño, F. Echeverrí, H. Liu, P. Skeldon, G.E. Thompson ‘Tribological behavior of electroless Ni-B coatings on magnesium and az91d alloy’, Wear,305(2013) 115-123
There are 6 citations in total.

Details

Primary Language English
Subjects Engineering
Journal Section Makaleler
Authors

Kübra Uçar

Uğur Şen

Publication Date January 31, 2019
Submission Date August 1, 2018
Acceptance Date November 13, 2018
Published in Issue Year 2019 Volume: 6 Issue: 1

Cite

IEEE K. Uçar and U. Şen, “Friction and Wear Properties of T6 Treatment And As-Plated Duplex NiP/NiB Coatings on Az91d Magnesium Alloy”, El-Cezeri Journal of Science and Engineering, vol. 6, no. 1, pp. 31–42, 2019, doi: 10.31202/ecjse.450204.
Creative Commons License El-Cezeri is licensed to the public under a Creative Commons Attribution 4.0 license.
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