Mechanical behavior and electrochemical stability of gas-nitrided FeMnAlC alloy in simulated body fluid

Shun Jen Hsueh; Jhen Yi Huang; Chuen-Guang Chao; Jenh-Yih Juang; Tzeng Feng Liu

doi:10.1016/j.matlet.2018.01.019

Mechanical behavior and electrochemical stability of gas-nitrided FeMnAlC alloy in simulated body fluid

Shun Jen Hsueh, Jhen Yi Huang, Chuen-Guang Chao, Jenh-Yih Juang, Tzeng Feng Liu^*

^*Corresponding author for this work

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

5 Scopus citations

Abstract

The mechanical performance and electrochemical stability in simulated body fluid (SBF) of a lightweight Fe-30Mn-10Al-1C (in wt.%) alloy after gas nitridation were investigated. The gas nitriding process was performed at 550 °C for 5 h under pure NH₃ atmosphere. The nitrided layer was ∼45 μm-thick and consisted predominantly of fine AlN. The surface microhardness, ultimate tensile strength, yield strength, and elongation of the present gas-nitrided alloy are 1814 Hv, 1078 MPa, 1024 MPa, and 77%, respectively. The corrosion tests in SBF showed that the gas-nitrided alloy exhibited a corrosion current density (I_corr) of 5.0 × 10⁻⁹ A/cm², a pitting corrosion current density (I_pit) of 5.1 × 10⁻⁷ A/cm², and a passivation region with ΔE (≡E_p − E_corr) ≈ +1804 mV, respectively, which are substantially better than those obtained in the plasma-nitrided and hydroxyapatite-coated 316L stainless steel. The results demonstrated that the present gas-nitrided alloy having an excellent combination of strength, ductility and corrosion resistance is a promising candidate to replace 316L stainless steel for medical implants.

Original language	English
Pages (from-to)	150-153
Number of pages	4
Journal	Materials Letters
Volume	216
DOIs	https://doi.org/10.1016/j.matlet.2018.01.019
State	Published - 1 Apr 2018

Keywords

Corrosion
Metallurgy
Metals and alloys
Simulated body fluid

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10.1016/j.matlet.2018.01.019

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title = "Mechanical behavior and electrochemical stability of gas-nitrided FeMnAlC alloy in simulated body fluid",

abstract = "The mechanical performance and electrochemical stability in simulated body fluid (SBF) of a lightweight Fe-30Mn-10Al-1C (in wt.%) alloy after gas nitridation were investigated. The gas nitriding process was performed at 550 °C for 5 h under pure NH3 atmosphere. The nitrided layer was ∼45 μm-thick and consisted predominantly of fine AlN. The surface microhardness, ultimate tensile strength, yield strength, and elongation of the present gas-nitrided alloy are 1814 Hv, 1078 MPa, 1024 MPa, and 77%, respectively. The corrosion tests in SBF showed that the gas-nitrided alloy exhibited a corrosion current density (Icorr) of 5.0 × 10−9 A/cm2, a pitting corrosion current density (Ipit) of 5.1 × 10−7 A/cm2, and a passivation region with ΔE (≡Ep − Ecorr) ≈ +1804 mV, respectively, which are substantially better than those obtained in the plasma-nitrided and hydroxyapatite-coated 316L stainless steel. The results demonstrated that the present gas-nitrided alloy having an excellent combination of strength, ductility and corrosion resistance is a promising candidate to replace 316L stainless steel for medical implants.",

keywords = "Corrosion, Metallurgy, Metals and alloys, Simulated body fluid",

author = "Hsueh, {Shun Jen} and Huang, {Jhen Yi} and Chuen-Guang Chao and Jenh-Yih Juang and Liu, {Tzeng Feng}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

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doi = "10.1016/j.matlet.2018.01.019",

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T1 - Mechanical behavior and electrochemical stability of gas-nitrided FeMnAlC alloy in simulated body fluid

AU - Hsueh, Shun Jen

AU - Huang, Jhen Yi

AU - Chao, Chuen-Guang

AU - Juang, Jenh-Yih

AU - Liu, Tzeng Feng

PY - 2018/4/1

Y1 - 2018/4/1

N2 - The mechanical performance and electrochemical stability in simulated body fluid (SBF) of a lightweight Fe-30Mn-10Al-1C (in wt.%) alloy after gas nitridation were investigated. The gas nitriding process was performed at 550 °C for 5 h under pure NH3 atmosphere. The nitrided layer was ∼45 μm-thick and consisted predominantly of fine AlN. The surface microhardness, ultimate tensile strength, yield strength, and elongation of the present gas-nitrided alloy are 1814 Hv, 1078 MPa, 1024 MPa, and 77%, respectively. The corrosion tests in SBF showed that the gas-nitrided alloy exhibited a corrosion current density (Icorr) of 5.0 × 10−9 A/cm2, a pitting corrosion current density (Ipit) of 5.1 × 10−7 A/cm2, and a passivation region with ΔE (≡Ep − Ecorr) ≈ +1804 mV, respectively, which are substantially better than those obtained in the plasma-nitrided and hydroxyapatite-coated 316L stainless steel. The results demonstrated that the present gas-nitrided alloy having an excellent combination of strength, ductility and corrosion resistance is a promising candidate to replace 316L stainless steel for medical implants.

AB - The mechanical performance and electrochemical stability in simulated body fluid (SBF) of a lightweight Fe-30Mn-10Al-1C (in wt.%) alloy after gas nitridation were investigated. The gas nitriding process was performed at 550 °C for 5 h under pure NH3 atmosphere. The nitrided layer was ∼45 μm-thick and consisted predominantly of fine AlN. The surface microhardness, ultimate tensile strength, yield strength, and elongation of the present gas-nitrided alloy are 1814 Hv, 1078 MPa, 1024 MPa, and 77%, respectively. The corrosion tests in SBF showed that the gas-nitrided alloy exhibited a corrosion current density (Icorr) of 5.0 × 10−9 A/cm2, a pitting corrosion current density (Ipit) of 5.1 × 10−7 A/cm2, and a passivation region with ΔE (≡Ep − Ecorr) ≈ +1804 mV, respectively, which are substantially better than those obtained in the plasma-nitrided and hydroxyapatite-coated 316L stainless steel. The results demonstrated that the present gas-nitrided alloy having an excellent combination of strength, ductility and corrosion resistance is a promising candidate to replace 316L stainless steel for medical implants.

KW - Corrosion

KW - Metallurgy

KW - Metals and alloys

KW - Simulated body fluid

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M3 - Article

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VL - 216

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JO - Materials Letters

JF - Materials Letters

ER -

Mechanical behavior and electrochemical stability of gas-nitrided FeMnAlC alloy in simulated body fluid

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