Microstructure evolution and deformation mechanisms during compression of a harmonic-structured Ti-24Nb-4Zr-8Sn alloy

doi:10.1016/j.jmrt.2023.07.250

IMR OpenIR

	Microstructure evolution and deformation mechanisms during compression of a harmonic-structured Ti-24Nb-4Zr-8Sn alloy
	Fer, Benoit 1,4; Tingaud, David 1; Gubicza, Jeno 2,5; Chinh, Nguyen Quang 2; Hao, Yulin 3; Prima, Frederic 4; Cazes, Fabien 1; Dirras, Guy 1
通讯作者	Fer, Benoit(ferbenoit@gmail.com) ; Gubicza, Jeno(jeno.gubicza@ttk.elte.hu)
	2023-09-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	26 页码:1260-1275
摘要	Processing heterogeneous microstructures, especially the so-called harmonic structures consisting of soft core and hard shell regions, is an efficient way to achieve a strength-ductility trade-off in classical metallurgy. In this study, two harmonic samples with the same composition of Ti-24Nb-4Zr-8Sn but different microstructures were processed to exhibit different grain size heterogeneities between the core and the shell. Both samples were consolidated from a ball-milled powder using Spark Plasma Sintering (SPS) but applying two different sintering times, 1 and 60 min. The grain size heterogeneities were higher for the longer SPS sintering time due to the enhanced grain dimension in the core for 60 min consolidation time. The mechanical behavior of the two materials was studied via a monotonic quasi-static compression test. For both harmonic-structured Ti-24Nb-4Zr-8Sn alloys, a high compressive proof stress of about 1 GPa was detected. The strain-hardening rate was higher for the longer SPS time due to the higher grain size differ-ences between the core and shell. A high dislocation density was detected in both mate-rials after compression deformation (several tens of 1014 m-2). The dislocations tend to form cells and LAGBs during compression. The dislocation pile-ups at the core-shell in-terfaces caused a back stress of about 640 MPa after compression at 2-5% strains. The contributions of the different features of the microstructure (grain size, a phase pre-cipitates, and oxygen concentration) to the proof stress were determined. & COPY; 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
关键词	Titanium alloy Harmonic structure Spark Plasma Sintering Dislocations Plasticity mechanisms Hetero-deformation induced stress
资助者	French National Research Agency ; Ecole Doctorale Galilee ; University Sorbonne Paris Nord
DOI	10.1016/j.jmrt.2023.07.250
收录类别	SCI
语种	英语
资助项目	French National Research Agency ; Ecole Doctorale Galilee ; University Sorbonne Paris Nord ; [ANR 14-CE07-0003]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001069588700001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179152
专题	中国科学院金属研究所
通讯作者	Fer, Benoit; Gubicza, Jeno
作者单位	1.Univ Sorbonne Paris Nord, Lab Sci Proc & Mat, CNRS, UPR 3407, F-93430 Villetaneuse, France 2.Eotvos Lorand Univ, Dept Mat Phys, POB 32, H-1518 Budapest, Hungary 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.PSL Univ, Inst Rech Chim Paris, Chim ParisTech, CNRS, F-75005 Paris, France 5.Eotvos Lorand Univ, Dept Mat Phys, POB 32, H-1518 Budapest, Hungary
推荐引用方式 GB/T 7714	Fer, Benoit,Tingaud, David,Gubicza, Jeno,et al. Microstructure evolution and deformation mechanisms during compression of a harmonic-structured Ti-24Nb-4Zr-8Sn alloy[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,26:1260-1275.
APA	Fer, Benoit.,Tingaud, David.,Gubicza, Jeno.,Chinh, Nguyen Quang.,Hao, Yulin.,...&Dirras, Guy.(2023).Microstructure evolution and deformation mechanisms during compression of a harmonic-structured Ti-24Nb-4Zr-8Sn alloy.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,26,1260-1275.
MLA	Fer, Benoit,et al."Microstructure evolution and deformation mechanisms during compression of a harmonic-structured Ti-24Nb-4Zr-8Sn alloy".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 26(2023):1260-1275.