Publication

Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process

Kamat, A. M., Segall, A. E., Copley, S. M. & Todd, J. A., 25-Sep-2017, In : Surface and Coatings Technology. 325, p. 229-238 10 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

Kamat, A. M., Segall, A. E., Copley, S. M., & Todd, J. A. (2017). Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process. Surface and Coatings Technology, 325, 229-238. https://doi.org/10.1016/j.surfcoat.2017.06.030

Author

Kamat, Amar M. ; Segall, Albert E. ; Copley, Stephen M. ; Todd, Judith A. / Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process. In: Surface and Coatings Technology. 2017 ; Vol. 325. pp. 229-238.

Harvard

Kamat, AM, Segall, AE, Copley, SM & Todd, JA 2017, 'Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process', Surface and Coatings Technology, vol. 325, pp. 229-238. https://doi.org/10.1016/j.surfcoat.2017.06.030

Standard

Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process. / Kamat, Amar M.; Segall, Albert E.; Copley, Stephen M.; Todd, Judith A.

In: Surface and Coatings Technology, Vol. 325, 25.09.2017, p. 229-238.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

Kamat AM, Segall AE, Copley SM, Todd JA. Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process. Surface and Coatings Technology. 2017 Sep 25;325:229-238. https://doi.org/10.1016/j.surfcoat.2017.06.030


BibTeX

@article{4375ffb07f37460d97d2449c4e0cc70c,
title = "Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process",
abstract = "In this paper, a method of forming hard, wide-area, crack-free, and wear-resistant nitrided cases on commercially-pure titanium using a 3.5 kW CO2 laser-sustained plasma is described. This surface hardening method was comprised of two steps: (1) a laser-sustained nitrogen plasma was first used to nitride the titanium substrate; and (2) a laser-sustained argon plasma was then employed to remelt the nitrided layer deposited in the first step. Previous research using single laser trail experiments had shown that the (second) remelting step can eliminate cracks formed during the (first) nitriding step and homogenize the nitrided layer. In this work, the two-step nitriding-remelting process was extended to wider surface areas by depositing multiple overlapping trails at four different nitriding speeds and a constant remelting speed. The hardened layer was characterized using x-ray diffraction (XRD), optical metallography, and hardness testing. Reciprocating ball-on-flat wear tests were conducted to assess the wear resistance of the nitrided case, with the wear scar being characterized using scanning electron microscopy (SEM) and optical profilometry. Crack-free, hard cases of depths up to 600 μm and average hardness values up to 641 ± 86 HV0.3 were observed. The LSP nitriding-remelting treatment was found to improve the wear resistance of the base metal (CP-Ti) by up to 80{\%}.",
keywords = "Case hardening, Laser nitriding, Laser-sustained plasma, Titanium, Wear resistance",
author = "Kamat, {Amar M.} and Segall, {Albert E.} and Copley, {Stephen M.} and Todd, {Judith A.}",
year = "2017",
month = "9",
day = "25",
doi = "10.1016/j.surfcoat.2017.06.030",
language = "English",
volume = "325",
pages = "229--238",
journal = "Surface & Coatings Technology",
issn = "0257-8972",
publisher = "Elsevier Science",

}

RIS

TY - JOUR

T1 - Enhancement of CP-titanum wear resistance using a two-step CO2 laser-sustained plasma nitriding process

AU - Kamat, Amar M.

AU - Segall, Albert E.

AU - Copley, Stephen M.

AU - Todd, Judith A.

PY - 2017/9/25

Y1 - 2017/9/25

N2 - In this paper, a method of forming hard, wide-area, crack-free, and wear-resistant nitrided cases on commercially-pure titanium using a 3.5 kW CO2 laser-sustained plasma is described. This surface hardening method was comprised of two steps: (1) a laser-sustained nitrogen plasma was first used to nitride the titanium substrate; and (2) a laser-sustained argon plasma was then employed to remelt the nitrided layer deposited in the first step. Previous research using single laser trail experiments had shown that the (second) remelting step can eliminate cracks formed during the (first) nitriding step and homogenize the nitrided layer. In this work, the two-step nitriding-remelting process was extended to wider surface areas by depositing multiple overlapping trails at four different nitriding speeds and a constant remelting speed. The hardened layer was characterized using x-ray diffraction (XRD), optical metallography, and hardness testing. Reciprocating ball-on-flat wear tests were conducted to assess the wear resistance of the nitrided case, with the wear scar being characterized using scanning electron microscopy (SEM) and optical profilometry. Crack-free, hard cases of depths up to 600 μm and average hardness values up to 641 ± 86 HV0.3 were observed. The LSP nitriding-remelting treatment was found to improve the wear resistance of the base metal (CP-Ti) by up to 80%.

AB - In this paper, a method of forming hard, wide-area, crack-free, and wear-resistant nitrided cases on commercially-pure titanium using a 3.5 kW CO2 laser-sustained plasma is described. This surface hardening method was comprised of two steps: (1) a laser-sustained nitrogen plasma was first used to nitride the titanium substrate; and (2) a laser-sustained argon plasma was then employed to remelt the nitrided layer deposited in the first step. Previous research using single laser trail experiments had shown that the (second) remelting step can eliminate cracks formed during the (first) nitriding step and homogenize the nitrided layer. In this work, the two-step nitriding-remelting process was extended to wider surface areas by depositing multiple overlapping trails at four different nitriding speeds and a constant remelting speed. The hardened layer was characterized using x-ray diffraction (XRD), optical metallography, and hardness testing. Reciprocating ball-on-flat wear tests were conducted to assess the wear resistance of the nitrided case, with the wear scar being characterized using scanning electron microscopy (SEM) and optical profilometry. Crack-free, hard cases of depths up to 600 μm and average hardness values up to 641 ± 86 HV0.3 were observed. The LSP nitriding-remelting treatment was found to improve the wear resistance of the base metal (CP-Ti) by up to 80%.

KW - Case hardening

KW - Laser nitriding

KW - Laser-sustained plasma

KW - Titanium

KW - Wear resistance

UR - http://www.scopus.com/inward/record.url?scp=85021349677&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2017.06.030

DO - 10.1016/j.surfcoat.2017.06.030

M3 - Article

VL - 325

SP - 229

EP - 238

JO - Surface & Coatings Technology

JF - Surface & Coatings Technology

SN - 0257-8972

ER -

ID: 87254186