Corrosion Study of Selective Laser Melted IN718 Alloy upon Post Heat Treatment and Shot Peening

Author:

Mythreyi Opadhrishta Venkataramana,Raja Allavikutty,Nagesha Bommanahalli Kenchappa,Jayaganthan Rengaswamy

Abstract

Selective laser melted (SLM) IN 718 alloy specimens are subjected to heat treatment and shot peening to assess the effect of post processing on the corrosion performance of the alloy in a 3.5 wt % NaCl solution. The four conditions used in this analysis are as-built material (AB), heat-treated as-built material (HT), shot-peened as-built material (SP), and heat-treated and shot-peened as-built material (HTSP). Microstructural studies revealed the presence of a 500 nm sized cellular structure with a γ matrix surrounded by the Laves phase in the AB material. Shot-peening reduced the surface roughness of the AB and HT samples to almost 80%. The potentiodynamic experiments revealed a highest Icorr value of 0.21 µA/cm2 for the AB material and the lowest Icorr value of 0.04 µA/cm2 for the HTSP material. In the Electrochemical Impedance Spectroscopy (EIS) analysis, the Nyquist plot substantiated the increasing corrosion resistance in the same order of decreasing corrosion rate. The Bode plot exhibited two resistance–capacitance (RC) time constants for all four conditions. The solution resistance measured around 30 Ω, with the HTSP specimen exhibiting the highest passive film resistance of 676 kΩ cm2 and the AB specimen exhibiting the lowest passive film resistance of 234 kΩ cm2. This study has shown that elimination of the network of the Laves phase in SLM material through heat treatment and smooth surface morphology achieved through shot peening improves the corrosion resistance of Inconel 718 alloy.

Publisher

MDPI AG

Subject

General Materials Science,Metals and Alloys

Reference67 articles.

1. Why Choosing Inconel 718 for Aerospace Additive Manufacturing? | Farinia Group, (n.d.)https://www.farinia.com/additive-manufacturing/3d-materials/inconel-718-aerospace-additive-manufacturing

2. Statistical Analysis of Failure Cases in Aerospace;Lv;Int. Sch. Sci. Res. Innov.,2018

3. Effect of nanostructure on corrosion and corrosion resistance of materials;El-Meligi;Curr. Chem. Res.,2012

4. Attack on superalloys by chemical and electrolytic processes

5. Influence of Corrosion Pitting On Alloy 718 Fatigue Capability;Groh,2001

Cited by 29 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Mechanical Properties and Microstructure of Inconel 718 Lattice Structures Produced by Selective Laser Melting Process;Materials;2024-01-27

2. Optimization of the Post-Heat Treatment of Additively Manufactured IN718;Journal of Materials Engineering and Performance;2024-01-23

3. Surface post-treatment of additively manufactured components;Additive Manufacturing of High-Performance Metallic Materials;2024

4. STRUCTURE AND HARDNESS ANALYSIS OF INCONEL 625 NICKEL SUPERALLOY WELDED BY TIG METHOD;International Journal of Modern Manufacturing Technologies;2023-12-20

5. Residual Stress Analysis of Additively Manufactured and Post Processed Inconel 718;Springer Proceedings in Materials;2023-12-04

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3