Research on hot-corrosion of Inconel718 nickel-based alloy treated by warm laser shock peening

被引：0

作者：

Zheng G. ^{[1
]}

Meng X. ^{[1
]}

Chen S. ^{[1
]}

Mu D. ^{[1
]}

Yang X. ^{[1
]}

Sheng J. ^{[1
]}

Zhou J. ^{[1
]}

机构：

[1] School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu

来源：

Zhongguo Jiguang | / 4卷

关键词：

Hot-corrosion; Inconel718 nickel-based alloys; Laser technology; Warm laser shock peening; γ″-phase precipitates;

D O I：

10.3788/CJL201643.0403005

中图分类号：

学科分类号：

摘要：

A SpitLight2000 nanosecond laser is used to conduct warm laser shock peening (WLSP) experiment on Inconel718 nickel-based alloys. Thermal corrosion test is conducted on the WLSP-samples and untreated samples in mixed molten salt (75%Na2SO4+25% NaCl, percentage mentioned above denotes mass fraction) at 700℃. Then the mechanism of WLSP to improve the corrosion resistance of Inconel718 nickel-based alloys is researched by quality detection, X-ray diffraction (XRD) diffraction analysis and corrosion morphology observation. The results show that quality losses in 260℃-WLSP-samples after 10 h and 25 h are 18.9% and 17.9% of that in untreated samples. In addition, after thermal corrosion for 10 h, Cr2O3 oxidation doesn't peel obviously on the corrosion surface of WLSP-samples and thus CrS or NiO is not formed. It is indicated that WLSP-samples can prevent implantation of S and thus effectively suppresses thermal corrosion of materials. The reason is that WLSP can lead to grain refinement and γ″-phase precipitates, which effectively prevents invasion of O and S, and thus improves thermal corrosion resistance of Inconel718 nickel-based alloys. © 2016, Chinese Lasers Press. All right reserved.

引用

页数：6

共 11 条

[1] Shi C., Zhong Z., China Superalloy Fifty Years, (2006)
[2] Guo J., The current situation of application and development of superalloy in the field of energy industry, Acta Metallurgica Sinica, 46, 5, pp. 513-527, (2010)
[3] Fu H., Challenge and development trends to future aero-engine materials, Journal of Aeronautical Materials, 18, 4, pp. 52-61, (1998)
[4] Long X., Mechanism of hot corrosion in high temperature parts of aeroengine, Total Corrosion Control, 17, 2, pp. 9-13, (2003)
[5] Li M., High Temperature Corrosion of Metals, (2001)
[6] Luo S., He W., Zhou L., Et al., Effects of laser shock processing on high temperature fatigue properties and fracture morphologies of K403 nickel-based alloy, Chinese J Lasers, 41, 9, (2014)
[7] Ye C., Gary J.C., Fatigue performance improvement in AISI 4140 steel by dynamic strain aging and dynamic precipitation during warm laser shock peening, Acta Materialia, 59, 3, pp. 1014-1025, (2011)
[8] Meng X., Zhou J., Huang S., Et al., Molecular dynamics simulation of dislocation development in monocrystalline copper induced by warm laser peening, Chinese J Lasers, 42, 7, (2015)
[9] Zhou J., Han Y., Huang S., Et al., Effect of different process temperature on residual stress and nano-hardness of warm laser peened IN718 superalloy, Chinese J Lasers, 42, 7, (2015)
[10] Cai D., Nie P., Shan J., Precipitation of phase and residual stress relaxation in shot peened Inconel718, Nonferrous Metals, 55, 3, pp. 19-22, (2003)

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