A Comparative Tribo-Mechanical Behavior Analysis of Laser Cladded Nitronic 60 Coating Against Wrought Nitronic 60 Alloy

Journal Article · Fri Sep 16 00:00:00 EDT 2022 · Manufacturing Letters

DOI:https://doi.org/10.1016/j.mfglet.2022.07.072· OSTI ID:1888942

Roy, Sougata ^[1]; Sridharan, Niyanth ^[2]; Gangopadhyay, Arup ^[3]; Qu, Jun ^[2]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of North Dakota, Grand Forks, ND (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
3. Ford Motor Company, Detroit, MI (United States)

In this study the tribological and mechanical behavior of a laser cladded Nitronic 60 coating on maraging steel is compared to that of a wrought Nitronic 60 alloy. A multi-layer Nitronic 60 coating was deposited using laser directed energy deposition, and its microstructure, porosity, and microhardness were characterized. The microhardness of the coated region in the laser cladded Nitronic 60 varied between 270-300 HV whereas that for wrought form was 230 HV. Controlled tribological tests under motor oil lubricated conditions were conducted at both room and elevated temperatures. The laser cladded Nitronic coating exhibited poorer wear resistance at room temperature but higher wear resistance at elevated temperature as compared to the wrought Nitronic alloy. Severe plastic deformation and fracture was observed on the laser cladded coating after the wear tests at both temperatures. Wear mechanisms were investigated based on the morphological and compositional characterization of the wear tracks.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1888942
• Journal Information: Manufacturing Letters, Journal Name: Manufacturing Letters Journal Issue: Supplement Vol. 33; ISSN 2213-8463
• Publisher: Society of Manufacturing Engineers, Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Additive manufacturing
Hardfacing alloy
Laser cladding
Nitronic
Sliding wear