Solidification structure and aging response of laser additive manufactured Inconel 718

被引：3
|
作者：
Liu, Xingbo [1 ,2 ]
Xiao, Wenjia [1 ,2 ]
Song, Lijun [1 ,2 ]
Xiao, Hui [1 ,2 ]
机构：
[1] Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Peoples R China
[2] Foshan Univ, Sch Mechatron Engn & Automat, Foshan 528225, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2022年 / 128卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Additive manufacturing; Nickel-based superalloy; Microstructure; Mechanical property; LAVES PHASE-FORMATION; MECHANICAL-PROPERTIES; METALLIC COMPONENTS; HEAT-TREATMENT; MICROSTRUCTURE; SEGREGATION; SUPERALLOY; DEPOSITION; BEHAVIOR; PARAMETERS;
D O I：
10.1007/s00339-022-05574-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dendritic structure, element segregation and Laves phase morphology of laser additive manufactured Inconel 718 were controlled by regulating laser processing parameters. Two typical specimens with different as-fabricated microstructure were obtained. The responses of microstructure and mechanical property of the specimens to direct aging treatment were investigated. The high molten-pool cooling rate from the high laser power (P) of 1200 W and scanning speed (V) of 12 mm/s (P1200/V12) was found to refine the dendrite structure and reduce the Laves phase. The specimen with reduced Nb segregation and discrete Laves phase showed a good aging response with high hardness and tensile strength due to the high-density precipitation of Nb-rich hardening phase. The present work contributes to the control of the microstructure and mechanical properties of Inconel 718.
引用
收藏
页数：10
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