Scopus
🔓 Açık Erişim
Microstructure and machinability evaluation in micro milling of selective laser melted Inconel 718 alloy
Journal of Materials Research and Technology · Eylül 2021
Makale Bilgileri
DergiJournal of Materials Research and Technology
Yayın TarihiEylül 2021
Cilt / Sayfa14 · 348-362
Scopus ID2-s2.0-85109438021
Erişim🔓 Açık Erişim
Özet
Selective laser melting (SLM) of Inconel 718 (IN718) alloy is common these days. The microstructure and surface integrity of fabricated components are highly depend on SLM parameters and post-processing processes. Micro milling is a promising solution to achieve good surface finish. However, the machinability of SLM fabricated IN718 is different than the wrought IN718 due to their significant differences in microstructure and properties, thus technical parameters applicable for wrought IN718 are unsuitable to SLM fabricated IN718. Therefore, the microstructure and machinability of SLM fabricated IN718 during micro milling processes were evaluated in this work, and comparisons with wrought IN718 were made. Micro milling experiments with varied spindle speed and feed rate were performed and comparisons between tool wear, surface roughness, residual stress and micro hardness were made. Further, the microstructure of SLM fabricated and wrought IN718 before and after machining were compared in terms of grain geometry and crystallographic texture. SLM fabricated IN718 shows slight grain coarsening and texture weaken behaviors, which is different with the obvious grain coarsening and slight texture strengthen phenomena of wrought IN718. The SLM fabricated component has lower compressive residual stress as compared with wrought alloy, and the tool wear, surface roughness and micro hardness values are higher while micro milling wrought IN718 alloy. The reasons leading to these differences were analyzed from the perspectives of technological characteristics and material properties. Observed phenomena and clarified mechanisms can be used as basis to determine suitable technological parameters of micro milling SLM fabricated IN718 alloy.
Yazarlar (8)
1
Hansong Ji
ORCID: 0000-0001-5727-7367
2
Munish Kumar Gupta
ORCID: 0000-0002-0777-1559
3
Qinghua Song
ORCID: 0000-0002-9792-9988
4
Wentong Cai
ORCID: 0000-0002-0782-1341
5
Tao Zheng
6
Youle Zhao
7
Zhanqiang Liu
8
Danil Yurievich Pimenov
Anahtar Kelimeler
Inconel 718 alloy
Machinability
Micro milling
Microstructure
SLM
Kurumlar
Shandong University
Jinan China
South Ural State University
Chelyabinsk Russian Federation
Metrikler
72
Atıf
8
Yazar
5
Anahtar Kelime