Effect of Laser Power on the Recrystallization Temperature of an Additively Manufactured IN718

Son, Deuk Hyun; Kim, In Soo; Choi, Baig-Gyu; Do, Jeonghyeon; Choi, Yoon Suk; Jung, Joong Eun

doi:10.3390/met13081355

Open AccessArticle

Effect of Laser Power on the Recrystallization Temperature of an Additively Manufactured IN718

by

Deuk Hyun Son

^1,2,

In Soo Kim

²,

Baig-Gyu Choi

²,

Jeonghyeon Do

²,

Yoon Suk Choi

^1,* and

Joong Eun Jung

^2,*

¹

School of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea

²

High Temperature Materials Research Group, Korea Institute of Materials Science, Changwon 51508, Republic of Korea

^*

Authors to whom correspondence should be addressed.

Metals 2023, 13(8), 1355; https://doi.org/10.3390/met13081355

Submission received: 7 June 2023 / Revised: 5 July 2023 / Accepted: 25 July 2023 / Published: 28 July 2023

(This article belongs to the Special Issue Additive Manufacturing of High Temperature Alloys)

Download

Browse Figures

Versions Notes

Abstract

Over the past few decades, there has been much research on additive manufacturing in both the academic and the industrial spheres to overcome the limitations of conventional manufacturing methods, thereby enabling the production of complex designs for improved performance. To achieve this purpose, it is crucial to meticulously set suitable laser parameters within the context of microstructural characteristics, including type and fraction of defects, texture development, residual stress, and grain size, etc. In the present study, we focused on recrystallization behavior, a type of relaxation process for accumulated thermal stress during the L-PBF process, as a function of laser power applied on the L-PBF process. The laser power has significant effects on the amount of recrystallized grain, directly related to the recrystallization temperature. Within the range of laser power used in this study, a downward trend was observed in the recrystallization temperature as the laser power increased from 370 W to 390 W. This trend suggests that higher laser power leads to a faster cooling rate, influenced by the volume of melt pool as well as the amount of heat dissipation from the melt pool, resulting in higher thermal stress during the process.

Keywords: recrystallization temperature; driving force for recrystallization during laser powder bed fusion; laser powder bed fusion; IN718; thermal stress

Share and Cite

MDPI and ACS Style

Son, D.H.; Kim, I.S.; Choi, B.-G.; Do, J.; Choi, Y.S.; Jung, J.E. Effect of Laser Power on the Recrystallization Temperature of an Additively Manufactured IN718. Metals 2023, 13, 1355. https://doi.org/10.3390/met13081355

AMA Style

Son DH, Kim IS, Choi B-G, Do J, Choi YS, Jung JE. Effect of Laser Power on the Recrystallization Temperature of an Additively Manufactured IN718. Metals. 2023; 13(8):1355. https://doi.org/10.3390/met13081355

Chicago/Turabian Style

Son, Deuk Hyun, In Soo Kim, Baig-Gyu Choi, Jeonghyeon Do, Yoon Suk Choi, and Joong Eun Jung. 2023. "Effect of Laser Power on the Recrystallization Temperature of an Additively Manufactured IN718" Metals 13, no. 8: 1355. https://doi.org/10.3390/met13081355

APA Style

Son, D. H., Kim, I. S., Choi, B.-G., Do, J., Choi, Y. S., & Jung, J. E. (2023). Effect of Laser Power on the Recrystallization Temperature of an Additively Manufactured IN718. Metals, 13(8), 1355. https://doi.org/10.3390/met13081355

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

Effect of Laser Power on the Recrystallization Temperature of an Additively Manufactured IN718

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI