Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel

Tjipto Sujitno; Emy Mulyani; Suprapto; Wiwien Andriyanti; Didy Suharlan; Viktor Malau

doi:doi:10.11648/j.am.20190801.13

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Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel

Tjipto Sujitno, Emy Mulyani, Suprapto, Wiwien Andriyanti, Didy Suharlan, Viktor Malau

Received: 15 January 2019 Accepted: 20 February 2019 Published: 12 March 2019

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Abstract

AISI 4340 is known as super strength steel and widely applied in military equipment, aircraft components, automotive components, drilling device and so on because of its excellent behavior in wear, corrosion, fatigue, high temperature, and high-speed operating conditions. However, due to continuing work which reduced the performance of that component surface during their service life, an effort to improve the surface properties for a longer service life should be carried out. This paper presents the research result of the influence of diamond-like carbon coating deposited using home-made DC Chemical Vapor Deposition (DC-CVD) on the surface of AISI 4340 steel. As a carbon source, a mixture of argon (Ar) and methane (CH4) with a ratio of 24%: 76% was used in this experiment. The conditions of the experiment were 400°C of temperature at various gas pressures (1.2 mbar, 1.4 mbar, 1.6 mbar, 1.8 mbar, and 2.0 mbar) for 5 hours of coating time. Investigated surface properties are hardness, fatigue strength, and surface morphology. It was found that the optimum conditions in enhancing fatigue strength at 1.4 mbar of pressure. At these conditions, the fatigue strength increase from 401 MPa to 514 MPa, the microhardness increase from 327 VHN to 625 VHN. Based on surface morphology observation of the fracture surfaces, it shows that for raw material, an initiation crack starting from the surface. However, after being coated for 1.2 mbar, 1.4 mbar, and 1.6 mbar, the initial crack begins from the inside. The high hardness layer hinders the fatigue crack initiation.

DOI	10.11648/j.am.20190801.13
Published in	Advances in Materials (Volume 8, Issue 1, March 2019)
Page(s)	21-26
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

AISI 4340 Steel, Diamond-Like Carbon, Fatigue Strength, CVD

References

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[13]	Samatham Madhukar, Birudala Raga Harship, Yara Ajay Kumar, 2018, Study on improvement of fatigue life of materials by surface coatings, International Journal of Current Engineering and Technology, Vol 8, No.1 (Jan/Feb 2018).
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[15]	K. P. Furlan, A. N. Klein and D. Hotza, 2013, Diamond Like Carbon Films Deposited by Hydrocarbon Plasma Sources, Rev. Adv. Si 34 (2013) 165-172.
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APA Style

Tjipto Sujitno, Emy Mulyani, Suprapto, Wiwien Andriyanti, Didy Suharlan, et al. (2019). Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel. Advances in Materials, 8(1), 21-26. https://doi.org/10.11648/j.am.20190801.13

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ACS Style

Tjipto Sujitno; Emy Mulyani; Suprapto; Wiwien Andriyanti; Didy Suharlan, et al. Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel. Adv. Mater. 2019, 8(1), 21-26. doi: 10.11648/j.am.20190801.13

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AMA Style

Tjipto Sujitno, Emy Mulyani, Suprapto, Wiwien Andriyanti, Didy Suharlan, et al. Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel. Adv Mater. 2019;8(1):21-26. doi: 10.11648/j.am.20190801.13

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@article{10.11648/j.am.20190801.13,
  author = {Tjipto Sujitno and Emy Mulyani and Suprapto and Wiwien Andriyanti and Didy Suharlan and Viktor Malau},
  title = {Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel},
  journal = {Advances in Materials},
  volume = {8},
  number = {1},
  pages = {21-26},
  doi = {10.11648/j.am.20190801.13},
  url = {https://doi.org/10.11648/j.am.20190801.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20190801.13},
  abstract = {AISI 4340 is known as super strength steel and widely applied in military equipment, aircraft components, automotive components, drilling device and so on because of its excellent behavior in wear, corrosion, fatigue, high temperature, and high-speed operating conditions. However, due to continuing work which reduced the performance of that component surface during their service life, an effort to improve the surface properties for a longer service life should be carried out. This paper presents the research result of the influence of diamond-like carbon coating deposited using home-made DC Chemical Vapor Deposition (DC-CVD) on the surface of AISI 4340 steel. As a carbon source, a mixture of argon (Ar) and methane (CH4) with a ratio of 24%: 76% was used in this experiment. The conditions of the experiment were 400°C of temperature at various gas pressures (1.2 mbar, 1.4 mbar, 1.6 mbar, 1.8 mbar, and 2.0 mbar) for 5 hours of coating time. Investigated surface properties are hardness, fatigue strength, and surface morphology. It was found that the optimum conditions in enhancing fatigue strength at 1.4 mbar of pressure. At these conditions, the fatigue strength increase from 401 MPa to 514 MPa, the microhardness increase from 327 VHN to 625 VHN. Based on surface morphology observation of the fracture surfaces, it shows that for raw material, an initiation crack starting from the surface. However, after being coated for 1.2 mbar, 1.4 mbar, and 1.6 mbar, the initial crack begins from the inside. The high hardness layer hinders the fatigue crack initiation.},
 year = {2019}
}

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TY - JOUR
T1 - Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel
AU - Tjipto Sujitno
AU - Emy Mulyani
AU - Suprapto
AU - Wiwien Andriyanti
AU - Didy Suharlan
AU - Viktor Malau
Y1 - 2019/03/12
PY - 2019
N1 - https://doi.org/10.11648/j.am.20190801.13
DO - 10.11648/j.am.20190801.13
T2 - Advances in Materials
JF - Advances in Materials
JO - Advances in Materials
SP - 21
EP - 26
PB - Science Publishing Group
SN - 2327-252X
UR - https://doi.org/10.11648/j.am.20190801.13
AB - AISI 4340 is known as super strength steel and widely applied in military equipment, aircraft components, automotive components, drilling device and so on because of its excellent behavior in wear, corrosion, fatigue, high temperature, and high-speed operating conditions. However, due to continuing work which reduced the performance of that component surface during their service life, an effort to improve the surface properties for a longer service life should be carried out. This paper presents the research result of the influence of diamond-like carbon coating deposited using home-made DC Chemical Vapor Deposition (DC-CVD) on the surface of AISI 4340 steel. As a carbon source, a mixture of argon (Ar) and methane (CH4) with a ratio of 24%: 76% was used in this experiment. The conditions of the experiment were 400°C of temperature at various gas pressures (1.2 mbar, 1.4 mbar, 1.6 mbar, 1.8 mbar, and 2.0 mbar) for 5 hours of coating time. Investigated surface properties are hardness, fatigue strength, and surface morphology. It was found that the optimum conditions in enhancing fatigue strength at 1.4 mbar of pressure. At these conditions, the fatigue strength increase from 401 MPa to 514 MPa, the microhardness increase from 327 VHN to 625 VHN. Based on surface morphology observation of the fracture surfaces, it shows that for raw material, an initiation crack starting from the surface. However, after being coated for 1.2 mbar, 1.4 mbar, and 1.6 mbar, the initial crack begins from the inside. The high hardness layer hinders the fatigue crack initiation.
VL - 8
IS - 1
ER -

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Author Information

Tjipto Sujitno

Particle Physics Department, Center for Accelerator Science and Technology, National Nuclear Energy Agency, Yogyakarta, Indonesia
Emy Mulyani

Particle Physics Department, Center for Accelerator Science and Technology, National Nuclear Energy Agency, Yogyakarta, Indonesia
Suprapto

Particle Physics Department, Center for Accelerator Science and Technology, National Nuclear Energy Agency, Yogyakarta, Indonesia
Wiwien Andriyanti

Particle Physics Department, Center for Accelerator Science and Technology, National Nuclear Energy Agency, Yogyakarta, Indonesia
Didy Suharlan

Mechanical Engineering Department, Gadjah Mada University, Yogyakarta, Indonesia
Viktor Malau

Mechanical Engineering Department, Gadjah Mada University, Yogyakarta, Indonesia

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APA Style

Tjipto Sujitno, Emy Mulyani, Suprapto, Wiwien Andriyanti, Didy Suharlan, et al. (2019). Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel. Advances in Materials, 8(1), 21-26. https://doi.org/10.11648/j.am.20190801.13

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ACS Style

Tjipto Sujitno; Emy Mulyani; Suprapto; Wiwien Andriyanti; Didy Suharlan, et al. Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel. Adv. Mater. 2019, 8(1), 21-26. doi: 10.11648/j.am.20190801.13

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AMA Style

Tjipto Sujitno, Emy Mulyani, Suprapto, Wiwien Andriyanti, Didy Suharlan, et al. Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel. Adv Mater. 2019;8(1):21-26. doi: 10.11648/j.am.20190801.13

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@article{10.11648/j.am.20190801.13,
  author = {Tjipto Sujitno and Emy Mulyani and Suprapto and Wiwien Andriyanti and Didy Suharlan and Viktor Malau},
  title = {Effect of Diamond-Like Carbon Thin Film on the Fatigue Strength of AISI 4340 Steel},
  journal = {Advances in Materials},
  volume = {8},
  number = {1},
  pages = {21-26},
  doi = {10.11648/j.am.20190801.13},
  url = {https://doi.org/10.11648/j.am.20190801.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20190801.13},
  abstract = {AISI 4340 is known as super strength steel and widely applied in military equipment, aircraft components, automotive components, drilling device and so on because of its excellent behavior in wear, corrosion, fatigue, high temperature, and high-speed operating conditions. However, due to continuing work which reduced the performance of that component surface during their service life, an effort to improve the surface properties for a longer service life should be carried out. This paper presents the research result of the influence of diamond-like carbon coating deposited using home-made DC Chemical Vapor Deposition (DC-CVD) on the surface of AISI 4340 steel. As a carbon source, a mixture of argon (Ar) and methane (CH4) with a ratio of 24%: 76% was used in this experiment. The conditions of the experiment were 400°C of temperature at various gas pressures (1.2 mbar, 1.4 mbar, 1.6 mbar, 1.8 mbar, and 2.0 mbar) for 5 hours of coating time. Investigated surface properties are hardness, fatigue strength, and surface morphology. It was found that the optimum conditions in enhancing fatigue strength at 1.4 mbar of pressure. At these conditions, the fatigue strength increase from 401 MPa to 514 MPa, the microhardness increase from 327 VHN to 625 VHN. Based on surface morphology observation of the fracture surfaces, it shows that for raw material, an initiation crack starting from the surface. However, after being coated for 1.2 mbar, 1.4 mbar, and 1.6 mbar, the initial crack begins from the inside. The high hardness layer hinders the fatigue crack initiation.},
 year = {2019}
}

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