Bibliographic Details
| Title: |
Evaluation of laser cladding of Ti6Al4V-ZrO2-CeO2 composite coating on Ti6Al4V alloy substrate. |
| Authors: |
Murmu, Anand M.1,2 (AUTHOR), Parida, Sambit Kumar1 (AUTHOR) skparida@niamt.ac.in, Das, Alok K.2 (AUTHOR), Kumar, Shakti2 (AUTHOR) |
| Source: |
Surface & Coatings Technology. Nov2023, Vol. 473, pN.PAG-N.PAG. 1p. |
| Subjects: |
Metallic composites, Composite coating, Titanium alloys, Aluminum oxide, Cerium oxides, Wear resistance, Mechanical wear |
| Abstract: |
A titanium metal matrix composite (Ti6Al4V-ZrO 2 -CeO 2) cladding is performed on Ti6Al4V alloy by irradiating a pulsed wave fibre laser source. A varying weight percentage of ceria (CeO 2) is added to the composite to study its effect on cladding microstructure, hardness, and wear properties. A detailed microstructure and phase identification study is made using FESEM, XRD, XPS, and EBSD. The presence of CeO 2 in the composite refines the microstructure of the clad. It promotes the in-situ formation of ceramic compounds such as Ce 1-x O 2 Zr x , Al 2 O 3 , Ti 6 O, and ZrO 2 and restricts acicular α‑titanium growth by favouring equiaxed CeO 2 growth. Due to grain refinement and the presence of hard ceramic compounds, the microhardness, COF, fracture toughness, and wear resistance is significantly affected with the variation of CeO 2 in the cladding. The lowest coefficient of friction (COF) and highest hardness value of 0.21 and 700HV 300 were obtained with samples containing 5 wt% of CeO 2. Also, the indicative parameters of wear resistance, such as H/E and H3/E2 computed from the nano-indentation test, are highest in the samples containing 5 wt% of CeO 2. The novelty lies in graded grain size and in-situ formed hard and rugged cladding without vertical cracks. • In-situ synthesised major phases Ce1-xO2Zrx (cubic), Ti 6 O, Al 2 O 3 , ZrO 2 , and CeO 2 compounds are developed on Ti6Al4V alloy. • Crack-free, low monoclinic ZrO 2 phase composite cladding on Ti6Al4V alloy. • Higher values of H/E and H3/E2 indicate stronger, tougher cladding and a good performance against wear resistance. • The coefficient of friction is improved with toughness at the expense of hardness (Max. 700HV 300). [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
