A distinct role of microstructure on hot corrosion behaviour of additively manufactured IN718

被引：0

作者：

Mannava, Venkateswararao ^{[1
,4
]}

Saravanan, T. T. ^{[2
]}

Sabari, Singaravelu Rajan ^{[4
]}

Koundinya, N. T. B. N. ^{[3
,4
]}

Venugopal, A. ^{[2
]}

Murty, S. V. S. N. ^{[2
]}

Govind, B. ^{[2
]}

Kamaraj, M. ^{[4
]}

Kottada, Ravi Sankar ^{[4
]}

机构：

[1] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada

[2] ISRO, Vikram Sarabhai Space Ctr, Thiruvananthapuram 695022, India

[3] IIT Jodhpur, Dept Met & Mat Engn, Karwar 342037, India

[4] IIT Madras, Dept Met & Mat Engn, Chennai 600036, India

来源：

CORROSION SCIENCE | 2024年 / 241卷

关键词：

superalloy; IN718; LPBF; GDOES; Raman spectroscopy; hot corrosion; Additive Manufacturing; NI-BASE SUPERALLOY; MECHANICAL-PROPERTIES; OXIDATION BEHAVIOR; ALLOY; ORIENTATION; NACL;

D O I：

10.1016/j.corsci.2024.112550

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of LPBF-IN718 microstructure on hot corrosion behavior was studied at 650 degrees C. The H-IN718 with <001> oriented grains undergo more weight changes than V-IN718 with <110> oriented grains. Detailed characterization analysis corroborates that Rapp-Goto fluxing and sulphidation mechanisms are operating in LPBF-IN718 with 3SM. Further, GDOES confirms the sulphur gradient existence between Air/3SM and 3SM/HIN718 interfaces. It suggests that <001> oriented grains serve as preferred sites for ion adsorption and reactions, which might facilitate the sulfur diffusion more effectively than other grain orientations. As a result, oxy-anions generated during sulfidation enhance the fluxing mechanism, thus increasing weight gain in H-IN718.

引用

页数：9

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