Pursued strength-ductility synergy in Ni superalloys produced by laser powder bed fusion: Crystallographic lamellar versus Directionally solidified microstructure

doi:10.1016/j.msea.2025.147838

IMR OpenIR

	Pursued strength-ductility synergy in Ni superalloys produced by laser powder bed fusion: Crystallographic lamellar versus Directionally solidified microstructure
	Wang, Peng 1,2; Liang, Jingjing 1; Zhu, Yuping 1; Yang, Junying 1,2; Zhou, Yizhou 1; Sun, Xiaofeng 1; Li, Jinguo 1
通讯作者	Liang, Jingjing(jjliang@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
	2025-03-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	925 页码:17
摘要	As a unique directional solidification microstructure of Ni superalloys produced by laser powder bed fusion (LPBF), the crystallographic lamellar microstructure (CLM) exhibits a strong texture with <001> and <110> orientation, thereby has potential application in aero-engine turbine blades. Nevertheless, in-depth mechanical properties studies remain lacking. In this study, comparative studies are conducted to reveal the unique deformation and strengthening mechanism of the CLM and DSM (directionally solidified microstructure) under room and high-temperature tensile conditions. However, substantial differences are observed in grain size, the number of grain boundaries, geometrical necessary dislocation (GND), elemental segregation, and crystallographic texture. The tensile results showed that the specimen with CLM exhibited an outstanding strength-ductility synergy due to the presence of high-proportioned <110> texture and unique <001> and <110> boundary. The regularly distributed <001> grains can serve as strong obstacles for slip bands and cracks propagating in <110> grains. Moreover, the <110> texture together with <001> and <110> boundary can elevate the local flow stresses and result in the activation of profuse deformation mechanisms, such as Planar slip bands, Stacking faults (SFs), and deformation twins. This work provides cross-scale insights into the deformation mechanisms and underscores the potential of CLM for developing high-temperature structural applications in Ni superalloy.
关键词	Laser powder bed fusion Crystallographic Lamellar microstructure Ni superalloys Mechanical property Deformation mechanism
资助者	Tech-nology Field fund ; Science Center for Gas Turbine Project
DOI	10.1016/j.msea.2025.147838
收录类别	SCI
语种	英语
资助项目	Tech-nology Field fund[2021-JCJQ-JJ-0092] ; Science Center for Gas Turbine Project[P2022-C-IV-002-001]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001408751300001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180512
专题	中国科学院金属研究所
通讯作者	Liang, Jingjing; Li, Jinguo
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Peng,Liang, Jingjing,Zhu, Yuping,et al. Pursued strength-ductility synergy in Ni superalloys produced by laser powder bed fusion: Crystallographic lamellar versus Directionally solidified microstructure[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,925:17.
APA	Wang, Peng.,Liang, Jingjing.,Zhu, Yuping.,Yang, Junying.,Zhou, Yizhou.,...&Li, Jinguo.(2025).Pursued strength-ductility synergy in Ni superalloys produced by laser powder bed fusion: Crystallographic lamellar versus Directionally solidified microstructure.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,925,17.
MLA	Wang, Peng,et al."Pursued strength-ductility synergy in Ni superalloys produced by laser powder bed fusion: Crystallographic lamellar versus Directionally solidified microstructure".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 925(2025):17.