The microstructural, micromechanical (Vickers microindentation, scratch testing) and tribological(pin on disk tests against steel and alumina spherical pins) properties of three High velocity oxy–fuel (HVOF) sprayed Ni based alloy coatings, namely Diamalloy 4006 (Ni–20Cr–10W–9Mo–4Cu–1B–1C–1Fe), Tribaloy-700 (Ni–32Mo–16Cr–4Si–2Co) and Inconel-625 (Ni–22Cr–9Mo–4Nb), werecharacterised, both in the as sprayed condition and after thermal treatments at 600uC and 800uC.As deposited Tribaloy-700 possesses a low degree of crystallinity and lower hardness; crystallineintermetallics are formed after heat treatments, definitely improving mechanical strength andtribological resistance against 100Cr6 steel counterpart, but not against alumina counterpart. TheInconel-625 and Diamalloy 4006 as sprayed coatings consist of supersaturated crystalline solidsolutions. The former is not much affected by heat treatments and has low hardness and poortribological properties. The latter, instead, displays precipitation of secondary phases after heattreatment. Particularly, the 600°C treatment improves coating strength and wear resistanceagainst steel, whereas the 800u°C one is less effective, probably because it causes excessivecrystal grain size increase.

Microstructural and Tribological Characterization of As-Sprayed and Heat-Treated HVOF Deposited Ni Alloys / Bolelli, Giovanni; Lusvarghi, Luca; F., PIGHETTI MANTINI; F., Casadei; M., Barletta. - In: SURFACE ENGINEERING. - ISSN 0267-0844. - STAMPA. - 23/5:(2007), pp. 355-372.

Microstructural and Tribological Characterization of As-Sprayed and Heat-Treated HVOF Deposited Ni Alloys

BOLELLI, Giovanni;LUSVARGHI, Luca;
2007-01-01

Abstract

The microstructural, micromechanical (Vickers microindentation, scratch testing) and tribological(pin on disk tests against steel and alumina spherical pins) properties of three High velocity oxy–fuel (HVOF) sprayed Ni based alloy coatings, namely Diamalloy 4006 (Ni–20Cr–10W–9Mo–4Cu–1B–1C–1Fe), Tribaloy-700 (Ni–32Mo–16Cr–4Si–2Co) and Inconel-625 (Ni–22Cr–9Mo–4Nb), werecharacterised, both in the as sprayed condition and after thermal treatments at 600uC and 800uC.As deposited Tribaloy-700 possesses a low degree of crystallinity and lower hardness; crystallineintermetallics are formed after heat treatments, definitely improving mechanical strength andtribological resistance against 100Cr6 steel counterpart, but not against alumina counterpart. TheInconel-625 and Diamalloy 4006 as sprayed coatings consist of supersaturated crystalline solidsolutions. The former is not much affected by heat treatments and has low hardness and poortribological properties. The latter, instead, displays precipitation of secondary phases after heattreatment. Particularly, the 600°C treatment improves coating strength and wear resistanceagainst steel, whereas the 800u°C one is less effective, probably because it causes excessivecrystal grain size increase.
23/5
355
372
Microstructural and Tribological Characterization of As-Sprayed and Heat-Treated HVOF Deposited Ni Alloys / Bolelli, Giovanni; Lusvarghi, Luca; F., PIGHETTI MANTINI; F., Casadei; M., Barletta. - In: SURFACE ENGINEERING. - ISSN 0267-0844. - STAMPA. - 23/5:(2007), pp. 355-372.
Bolelli, Giovanni; Lusvarghi, Luca; F., PIGHETTI MANTINI; F., Casadei; M., Barletta
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/609742
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 9
social impact