Effect of Thermal Treatment on Corrosion Behavior of AISI 316L Stainless Steel Manufactured by Laser Powder Bed Fusion

被引：10

作者：

Andreatta, Francesco ^{[1
]}

Lanzutti, Alex ^{[1
]}

Revilla, Reynier, I ^{[2
]}

Vaglio, Emanuele ^{[1
]}

Totis, Giovanni ^{[1
]}

Sortino, Marco ^{[1
]}

de Graeve, Iris ^{[2
]}

Fedrizzi, Lorenzo ^{[1
]}

机构：

[1] Univ Udine, Polytech Dept Engn & Architecture, Via Cotonificio 108, I-33100 Udine, Italy

[2] Vrije Univ Brussel VUB, Dept Mat & Chem, Electrochem & Surface Engn SURF, Pl Laan 2, B-1050 Brussels, Belgium

来源：

MATERIALS | 2022年 / 15卷 / 19期

关键词：

AISI 316L stainless steel; laser powder bed fusion; heat treatment; corrosion; PROCESS PARAMETERS; MICROSTRUCTURE; RESISTANCE; EVOLUTION; AUSTENITE;

D O I：

10.3390/ma15196768

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of post-processing heat treatment on the corrosion behavior of AISI 316L stainless steel manufactured by laser powder bed fusion (L-PBF) is investigated in this work. Produced stainless steel was heat treated in a broad temperature range (from 200 degrees C to 1100 degrees C) in order to evaluate the electrochemical behavior and morphology of corrosion. The electrochemical behavior was investigated by potentiodynamic and galvanostatic polarization in a neutral and acidic (pH 1.8) 3.5% NaCl solution. The microstructure modification after heat treatment and the morphology of attack of corroded samples were evaluated by optical and scanning electron microscopy. The fine cellular/columnar microstructure typically observed for additive-manufactured stainless steel evolves into a fine equiaxed austenitic structure after thermal treatment at high temperatures (above 800 degrees C). The post-processing thermal treatment does not negatively affect the electrochemical behavior of additive-manufactured stainless steel even after prolonged heat treatment at 1100 degrees C for 8 h and 24 h. This indicates that the excellent barrier properties of the native oxide film are retained after heat treatment.

引用

页数：17

共 39 条

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