Microstructure and mechanical properties of micro laser welding NiTiNb/Ti6Al4V dissimilar alloys lap joints with nickel interlayer

Yu Zhong; Jilin Xie; Yuhua Chen; Limeng Yin; Peng He; Weiwei Lu

doi:10.1016/j.matlet.2021.130896

Microstructure and mechanical properties of micro laser welding NiTiNb/Ti6Al4V dissimilar alloys lap joints with nickel interlayer

Yu Zhong
, Jilin Xie^*
, Yuhua Chen
, Limeng Yin
, Peng He
, Weiwei Lu

^*Corresponding author for this work

School of Materials Science and Engineering

Nanchang Hangkong University
Harbin Institute of Technology
Chongqing University of Science and Technology

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

76 Scopus citations

Abstract

The micro laser lap welding method formed a lap joint of NiTiNb shape memory alloys (SMAs) to Ti6Al4V alloy with a Ni interlayer. The microstructure and mechanical properties in the lap weld were studied by Optical microscope (OM), Scanning electron microscope (SEM), Energy dispersive spectroscopy (EDS), and tensile tests. The results show that the addition of a Ni interlayer still formed the brittle intermetallic compound Ti₂Ni. Moreover, the width of the brittle intermetallic compound Ti₂Ni region can reduce the crack sensitivity of the lap joint. The lap joint fractured in the fusion zone on the Ti6Al4V alloy side with a maximum shear load of 122N.

Original language	English
Article number	130896
Journal	Materials Letters
Volume	306
DOIs	https://doi.org/10.1016/j.matlet.2021.130896
State	Published - 1 Jan 2022

Keywords

Microstructure
Shape memory materials
Titanium alloy
Welding

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10.1016/j.matlet.2021.130896

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title = "Microstructure and mechanical properties of micro laser welding NiTiNb/Ti6Al4V dissimilar alloys lap joints with nickel interlayer",

abstract = "The micro laser lap welding method formed a lap joint of NiTiNb shape memory alloys (SMAs) to Ti6Al4V alloy with a Ni interlayer. The microstructure and mechanical properties in the lap weld were studied by Optical microscope (OM), Scanning electron microscope (SEM), Energy dispersive spectroscopy (EDS), and tensile tests. The results show that the addition of a Ni interlayer still formed the brittle intermetallic compound Ti2Ni. Moreover, the width of the brittle intermetallic compound Ti2Ni region can reduce the crack sensitivity of the lap joint. The lap joint fractured in the fusion zone on the Ti6Al4V alloy side with a maximum shear load of 122N.",

keywords = "Microstructure, Shape memory materials, Titanium alloy, Welding",

author = "Yu Zhong and Jilin Xie and Yuhua Chen and Limeng Yin and Peng He and Weiwei Lu",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = jan,

day = "1",

doi = "10.1016/j.matlet.2021.130896",

language = "英语",

volume = "306",

journal = "Materials Letters",

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TY - JOUR

T1 - Microstructure and mechanical properties of micro laser welding NiTiNb/Ti6Al4V dissimilar alloys lap joints with nickel interlayer

AU - Zhong, Yu

AU - Xie, Jilin

AU - Chen, Yuhua

AU - Yin, Limeng

AU - He, Peng

AU - Lu, Weiwei

PY - 2022/1/1

Y1 - 2022/1/1

N2 - The micro laser lap welding method formed a lap joint of NiTiNb shape memory alloys (SMAs) to Ti6Al4V alloy with a Ni interlayer. The microstructure and mechanical properties in the lap weld were studied by Optical microscope (OM), Scanning electron microscope (SEM), Energy dispersive spectroscopy (EDS), and tensile tests. The results show that the addition of a Ni interlayer still formed the brittle intermetallic compound Ti2Ni. Moreover, the width of the brittle intermetallic compound Ti2Ni region can reduce the crack sensitivity of the lap joint. The lap joint fractured in the fusion zone on the Ti6Al4V alloy side with a maximum shear load of 122N.

AB - The micro laser lap welding method formed a lap joint of NiTiNb shape memory alloys (SMAs) to Ti6Al4V alloy with a Ni interlayer. The microstructure and mechanical properties in the lap weld were studied by Optical microscope (OM), Scanning electron microscope (SEM), Energy dispersive spectroscopy (EDS), and tensile tests. The results show that the addition of a Ni interlayer still formed the brittle intermetallic compound Ti2Ni. Moreover, the width of the brittle intermetallic compound Ti2Ni region can reduce the crack sensitivity of the lap joint. The lap joint fractured in the fusion zone on the Ti6Al4V alloy side with a maximum shear load of 122N.

KW - Microstructure

KW - Shape memory materials

KW - Titanium alloy

KW - Welding

UR - https://www.scopus.com/pages/publications/85115418162

U2 - 10.1016/j.matlet.2021.130896

DO - 10.1016/j.matlet.2021.130896

M3 - 文章

AN - SCOPUS:85115418162

SN - 0167-577X

VL - 306

JO - Materials Letters

JF - Materials Letters

M1 - 130896

ER -

Microstructure and mechanical properties of micro laser welding NiTiNb/Ti6Al4V dissimilar alloys lap joints with nickel interlayer

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