Effect of Laser Mode and Power on the Tribological Behavior of Additively Manufactured Inconel 718 Alloy

Ismael A. Tombakti; Akeem Yusuf Adesina; Abdullah Alharith; Moataz M. Attallah; Bandar AlMangour

doi:10.1115/1.4062361

Effect of Laser Mode and Power on the Tribological Behavior of Additively Manufactured Inconel 718 Alloy

Ismael A. Tombakti, Akeem Yusuf Adesina^*, Abdullah Alharith, Moataz M. Attallah, Bandar AlMangour^*

^*Corresponding author for this work

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

Abstract

The influence of laser modes and power on the tribological behavior of additively manufactured Inconel 718 alloy using the directed energy deposition (DED) process was investigated. The samples were fabricated with continuous wave (CW) and pulse wave (PW) laser modes using 700, 900, and 1100 W laser power. The samples exhibited high hardness (3–5 GPa) and modulus (150–200 GPa) which increases with the laser power for CW- and PW-fabricated samples, and this was associated with the increasing densification and hardening secondary phase. The coefficient of friction increases with laser power for the CW samples but decreases for the PW samples. The samples exhibited low wear rates ranging between 25 and 70 × 10⁻⁵ mm³/Nm. Pulse wave samples demonstrated better tribological performance compared to continuous wave at any laser power. The dominant wear mechanism is the three-body abrasive wear followed by localized and discrete adhesion wear mechanism.

Original language	English
Article number	101703
Number of pages	13
Journal	Journal of Tribology
Volume	145
Issue number	10
Early online date	25 May 2023
DOIs	https://doi.org/10.1115/1.4062361
Publication status	Published - Oct 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 by ASME.

Keywords

abrasion
additive manufacturing
directed energy deposition
friction
Inconel 718
sliding
tribology
wear
wear mechanisms

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Surfaces and Interfaces
Surfaces, Coatings and Films

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title = "Effect of Laser Mode and Power on the Tribological Behavior of Additively Manufactured Inconel 718 Alloy",

abstract = "The influence of laser modes and power on the tribological behavior of additively manufactured Inconel 718 alloy using the directed energy deposition (DED) process was investigated. The samples were fabricated with continuous wave (CW) and pulse wave (PW) laser modes using 700, 900, and 1100 W laser power. The samples exhibited high hardness (3–5 GPa) and modulus (150–200 GPa) which increases with the laser power for CW- and PW-fabricated samples, and this was associated with the increasing densification and hardening secondary phase. The coefficient of friction increases with laser power for the CW samples but decreases for the PW samples. The samples exhibited low wear rates ranging between 25 and 70 × 10−5 mm3/Nm. Pulse wave samples demonstrated better tribological performance compared to continuous wave at any laser power. The dominant wear mechanism is the three-body abrasive wear followed by localized and discrete adhesion wear mechanism.",

keywords = "abrasion, additive manufacturing, directed energy deposition, friction, Inconel 718, sliding, tribology, wear, wear mechanisms",

author = "Tombakti, {Ismael A.} and Adesina, {Akeem Yusuf} and Abdullah Alharith and Attallah, {Moataz M.} and Bandar AlMangour",

note = "Publisher Copyright: Copyright {\textcopyright} 2023 by ASME.",

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AU - Tombakti, Ismael A.

AU - Adesina, Akeem Yusuf

AU - Alharith, Abdullah

AU - Attallah, Moataz M.

AU - AlMangour, Bandar

PY - 2023/10

Y1 - 2023/10

N2 - The influence of laser modes and power on the tribological behavior of additively manufactured Inconel 718 alloy using the directed energy deposition (DED) process was investigated. The samples were fabricated with continuous wave (CW) and pulse wave (PW) laser modes using 700, 900, and 1100 W laser power. The samples exhibited high hardness (3–5 GPa) and modulus (150–200 GPa) which increases with the laser power for CW- and PW-fabricated samples, and this was associated with the increasing densification and hardening secondary phase. The coefficient of friction increases with laser power for the CW samples but decreases for the PW samples. The samples exhibited low wear rates ranging between 25 and 70 × 10−5 mm3/Nm. Pulse wave samples demonstrated better tribological performance compared to continuous wave at any laser power. The dominant wear mechanism is the three-body abrasive wear followed by localized and discrete adhesion wear mechanism.

AB - The influence of laser modes and power on the tribological behavior of additively manufactured Inconel 718 alloy using the directed energy deposition (DED) process was investigated. The samples were fabricated with continuous wave (CW) and pulse wave (PW) laser modes using 700, 900, and 1100 W laser power. The samples exhibited high hardness (3–5 GPa) and modulus (150–200 GPa) which increases with the laser power for CW- and PW-fabricated samples, and this was associated with the increasing densification and hardening secondary phase. The coefficient of friction increases with laser power for the CW samples but decreases for the PW samples. The samples exhibited low wear rates ranging between 25 and 70 × 10−5 mm3/Nm. Pulse wave samples demonstrated better tribological performance compared to continuous wave at any laser power. The dominant wear mechanism is the three-body abrasive wear followed by localized and discrete adhesion wear mechanism.

KW - abrasion

KW - additive manufacturing

KW - directed energy deposition

KW - friction

KW - Inconel 718

KW - sliding

KW - tribology

KW - wear

KW - wear mechanisms

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VL - 145

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JF - Journal of Tribology

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ER -

Effect of Laser Mode and Power on the Tribological Behavior of Additively Manufactured Inconel 718 Alloy

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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