Effects of heat treatment on hot corrosion behavior of directed energy deposited In718/316L functionally graded material

被引：26
|
作者：
Xu, Gang [1 ]
Wu, Runbao [1 ]
Luo, Kaiyu [1 ]
Lu, Jinzhong [1 ]
机构：
[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 197卷
基金：
中国国家自然科学基金;
关键词：
Functionally graded material; Directed energy deposition; Hot corrosion; Heat treatment; Microstructure; INCONEL; 718; MECHANICAL-PROPERTIES; STAINLESS-STEEL; MICROSTRUCTURE; TEMPERATURE; FABRICATION; EVOLUTION;
D O I：
10.1016/j.corsci.2021.110068
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of heat treatment (HT) on hot corrosion behavior of directed energy deposited (DEDed) In718/316 L functionally graded material (FGM) against 75 wt% Na2SO4 + 25 wt% NaCl molten salts at 850 degrees C were investigated. As a result, the DEDed In718/316 L FGM presented a gradual improvement in the hot corrosion resistance in building direction because of gradient-distributed Cr contents. The integral hot corrosion resistance of In718/316 L FGM was effectively improved by HT because more transmission channels were provided by HT-induced finer grains and granular Laves phases for Cr and Ni to diffuse and form Cr2O3 and NiO mixed oxide layer.
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页数：14
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