Heat treatment induced phase transition and microstructural evolution in electron beam surface melted Nb-Si based alloys

Yueling Guo; Lina Jia; Bin Kong; Hui Peng; Hu Zhang

doi:10.1016/j.apsusc.2017.05.248

Heat treatment induced phase transition and microstructural evolution in electron beam surface melted Nb-Si based alloys

Yueling Guo, Lina Jia^*, Bin Kong, Hui Peng, Hu Zhang

^*Corresponding author for this work

Beihang University

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

10 Citations (Scopus)

Abstract

The hardness, phase and microstructural development of Nb-18Si-24Ti-2Cr-2Al (at.%) alloys processed by electron beam surface melting (EBSM) and subsequent heat treatments were investigated. The EBSM experiments were performed using an electron beam based 3D printing system. Results showed that Nbss and Nb ₃ Si phases were obtained via EBSM with a significantly refined microstructure. The eutectoid reaction of Nb ₃ Si → Nbss + αNb ₅ Si ₃ was triggered by heat treatments (HT) at 1200 °C or 1450 °C for 5 h. The growth and the coarsening of αNb ₅ Si ₃ grains were promoted with a higher HT temperature. The hardness of the EBSM alloy was remarkably reduced by HT.

Original language	English
Pages (from-to)	417-420
Number of pages	4
Journal	Applied Surface Science
Volume	423
DOIs	https://doi.org/10.1016/j.apsusc.2017.05.248
Publication status	Published - 30 Nov 2017
Externally published	Yes

Keywords

Heat treatment
Intermetallics
Nb-Si alloy
Rapid solidification
Surface melting

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10.1016/j.apsusc.2017.05.248

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title = "Heat treatment induced phase transition and microstructural evolution in electron beam surface melted Nb-Si based alloys",

abstract = " The hardness, phase and microstructural development of Nb-18Si-24Ti-2Cr-2Al (at.%) alloys processed by electron beam surface melting (EBSM) and subsequent heat treatments were investigated. The EBSM experiments were performed using an electron beam based 3D printing system. Results showed that Nbss and Nb 3 Si phases were obtained via EBSM with a significantly refined microstructure. The eutectoid reaction of Nb 3 Si → Nbss + αNb 5 Si 3 was triggered by heat treatments (HT) at 1200 °C or 1450 °C for 5 h. The growth and the coarsening of αNb 5 Si 3 grains were promoted with a higher HT temperature. The hardness of the EBSM alloy was remarkably reduced by HT.",

keywords = "Heat treatment, Intermetallics, Nb-Si alloy, Rapid solidification, Surface melting",

author = "Yueling Guo and Lina Jia and Bin Kong and Hui Peng and Hu Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = nov,

day = "30",

doi = "10.1016/j.apsusc.2017.05.248",

language = "English",

volume = "423",

pages = "417--420",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Heat treatment induced phase transition and microstructural evolution in electron beam surface melted Nb-Si based alloys

AU - Guo, Yueling

AU - Jia, Lina

AU - Kong, Bin

AU - Peng, Hui

AU - Zhang, Hu

PY - 2017/11/30

Y1 - 2017/11/30

N2 - The hardness, phase and microstructural development of Nb-18Si-24Ti-2Cr-2Al (at.%) alloys processed by electron beam surface melting (EBSM) and subsequent heat treatments were investigated. The EBSM experiments were performed using an electron beam based 3D printing system. Results showed that Nbss and Nb 3 Si phases were obtained via EBSM with a significantly refined microstructure. The eutectoid reaction of Nb 3 Si → Nbss + αNb 5 Si 3 was triggered by heat treatments (HT) at 1200 °C or 1450 °C for 5 h. The growth and the coarsening of αNb 5 Si 3 grains were promoted with a higher HT temperature. The hardness of the EBSM alloy was remarkably reduced by HT.

AB - The hardness, phase and microstructural development of Nb-18Si-24Ti-2Cr-2Al (at.%) alloys processed by electron beam surface melting (EBSM) and subsequent heat treatments were investigated. The EBSM experiments were performed using an electron beam based 3D printing system. Results showed that Nbss and Nb 3 Si phases were obtained via EBSM with a significantly refined microstructure. The eutectoid reaction of Nb 3 Si → Nbss + αNb 5 Si 3 was triggered by heat treatments (HT) at 1200 °C or 1450 °C for 5 h. The growth and the coarsening of αNb 5 Si 3 grains were promoted with a higher HT temperature. The hardness of the EBSM alloy was remarkably reduced by HT.

KW - Heat treatment

KW - Intermetallics

KW - Nb-Si alloy

KW - Rapid solidification

KW - Surface melting

UR - http://www.scopus.com/inward/record.url?scp=85021068471&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2017.05.248

DO - 10.1016/j.apsusc.2017.05.248

M3 - Article

AN - SCOPUS:85021068471

SN - 0169-4332

VL - 423

SP - 417

EP - 420

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Heat treatment induced phase transition and microstructural evolution in electron beam surface melted Nb-Si based alloys

Abstract

Keywords

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