Fracture Mode Transition in Nb–1Si Alloys Triggered by Annealing Heat Treatment

Bin Kong; Lina Jia; Songxin Shi; Yueling Guo; Hu Zhang

doi:10.1002/adem.201700442

Fracture Mode Transition in Nb–1Si Alloys Triggered by Annealing Heat Treatment

Bin Kong
, Lina Jia^*
, Songxin Shi
, Yueling Guo
, Hu Zhang

^*Corresponding author for this work

Beihang University

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The concentration of Si plays a crucial role in the ductile-brittle transition of Nb solid solution (Nb_SS) alloys, and an appropriate annealing treatment contributes to controlling the Si concentration in Nb_SS alloy. In this paper, Nb–1Si (at%) alloy is arc-melted and annealed at different temperature (1300, 1400, and 1500 °C) for 10 h. After annealing, both the strength and ductility increase. Particularly, after annealing at 1300 °C, the fracture feature transforms from cleavage to dimples, and the alloy possesses good strength and retains decent ductility due to the low Si concentration and small-sized intragranular Nb₃Si particles precipitating in the Nb_SS. The significant effect of annealing on the fracture mechanism of Nb–1Si provides guidance for the design of Nb–Si based alloys.

Original language	English
Article number	1700442
Journal	Advanced Engineering Materials
Volume	19
Issue number	12
DOIs	https://doi.org/10.1002/adem.201700442
Publication status	Published - Dec 2017
Externally published	Yes

Keywords

Si concentration
annealing
burgers
vectorductility

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10.1002/adem.201700442

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title = "Fracture Mode Transition in Nb–1Si Alloys Triggered by Annealing Heat Treatment",

abstract = "The concentration of Si plays a crucial role in the ductile-brittle transition of Nb solid solution (NbSS) alloys, and an appropriate annealing treatment contributes to controlling the Si concentration in NbSS alloy. In this paper, Nb–1Si (at\%) alloy is arc-melted and annealed at different temperature (1300, 1400, and 1500 °C) for 10 h. After annealing, both the strength and ductility increase. Particularly, after annealing at 1300 °C, the fracture feature transforms from cleavage to dimples, and the alloy possesses good strength and retains decent ductility due to the low Si concentration and small-sized intragranular Nb3Si particles precipitating in the NbSS. The significant effect of annealing on the fracture mechanism of Nb–1Si provides guidance for the design of Nb–Si based alloys.",

keywords = "Si concentration, annealing, burgers, vectorductility",

author = "Bin Kong and Lina Jia and Songxin Shi and Yueling Guo and Hu Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2017",

month = dec,

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language = "English",

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TY - JOUR

T1 - Fracture Mode Transition in Nb–1Si Alloys Triggered by Annealing Heat Treatment

AU - Kong, Bin

AU - Jia, Lina

AU - Shi, Songxin

AU - Guo, Yueling

AU - Zhang, Hu

PY - 2017/12

Y1 - 2017/12

N2 - The concentration of Si plays a crucial role in the ductile-brittle transition of Nb solid solution (NbSS) alloys, and an appropriate annealing treatment contributes to controlling the Si concentration in NbSS alloy. In this paper, Nb–1Si (at%) alloy is arc-melted and annealed at different temperature (1300, 1400, and 1500 °C) for 10 h. After annealing, both the strength and ductility increase. Particularly, after annealing at 1300 °C, the fracture feature transforms from cleavage to dimples, and the alloy possesses good strength and retains decent ductility due to the low Si concentration and small-sized intragranular Nb3Si particles precipitating in the NbSS. The significant effect of annealing on the fracture mechanism of Nb–1Si provides guidance for the design of Nb–Si based alloys.

AB - The concentration of Si plays a crucial role in the ductile-brittle transition of Nb solid solution (NbSS) alloys, and an appropriate annealing treatment contributes to controlling the Si concentration in NbSS alloy. In this paper, Nb–1Si (at%) alloy is arc-melted and annealed at different temperature (1300, 1400, and 1500 °C) for 10 h. After annealing, both the strength and ductility increase. Particularly, after annealing at 1300 °C, the fracture feature transforms from cleavage to dimples, and the alloy possesses good strength and retains decent ductility due to the low Si concentration and small-sized intragranular Nb3Si particles precipitating in the NbSS. The significant effect of annealing on the fracture mechanism of Nb–1Si provides guidance for the design of Nb–Si based alloys.

KW - Si concentration

KW - annealing

KW - burgers

KW - vectorductility

UR - https://www.scopus.com/pages/publications/85026767814

U2 - 10.1002/adem.201700442

DO - 10.1002/adem.201700442

M3 - Article

AN - SCOPUS:85026767814

SN - 1438-1656

VL - 19

JO - Advanced Engineering Materials

JF - Advanced Engineering Materials

IS - 12

M1 - 1700442

ER -

Fracture Mode Transition in Nb–1Si Alloys Triggered by Annealing Heat Treatment

Abstract

Keywords

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