In Situ Tensile Observation of the Effect of Annealing on Fracture Behavior of Laser Additive Manufactured Titanium Alloy

Ming Xu; Huaixue Li; Qi Liu; Feihu Shan; Yongxin Zhang; Wei Guo; Fei Li; Hongqiang Zhang

doi:10.3390/ma16113973

In Situ Tensile Observation of the Effect of Annealing on Fracture Behavior of Laser Additive Manufactured Titanium Alloy

Ming Xu
, Huaixue Li
, Qi Liu
, Feihu Shan
, Yongxin Zhang^*
, Wei Guo
, Fei Li
, Hongqiang Zhang^*

^*Corresponding author for this work

School of Mechanical Engineering and Automation

China Aviation Industry Corporation
Key Laboratory of Aeronautical Technology on Additive Manufacturing
Beihang University

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

6 Scopus citations

Abstract

The use safety of laser additive manufactured (LAM) titanium alloys is closely related to each one’s fracture failure mode. In this study, in situ tensile tests were carried out to study the deformation and fracture mechanisms of LAM Ti6Al4V titanium alloy before and after annealing treatment. The results showed that plastic deformation promoted slip bands to occur inside the α phase and shear bands to generate along the α/β interface. In the as-built sample, cracks initiated in the equiaxed grains and propagated along the columnar grain boundary, showing a mixed fracture mode. However, it transformed into a transgranular fracture after annealing treatment. The widmanstatten α phase acted as a barrier for slip movement and improved the crack resistance of grain boundaries.

Original language	English
Article number	3973
Journal	Materials
Volume	16
Issue number	11
DOIs	https://doi.org/10.3390/ma16113973
State	Published - Jun 2023

Keywords

additive manufacturing
annealing
fracture mechanism
in situ tensile
titanium alloys

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10.3390/ma16113973

Cite this

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title = "In Situ Tensile Observation of the Effect of Annealing on Fracture Behavior of Laser Additive Manufactured Titanium Alloy",

abstract = "The use safety of laser additive manufactured (LAM) titanium alloys is closely related to each one{\textquoteright}s fracture failure mode. In this study, in situ tensile tests were carried out to study the deformation and fracture mechanisms of LAM Ti6Al4V titanium alloy before and after annealing treatment. The results showed that plastic deformation promoted slip bands to occur inside the α phase and shear bands to generate along the α/β interface. In the as-built sample, cracks initiated in the equiaxed grains and propagated along the columnar grain boundary, showing a mixed fracture mode. However, it transformed into a transgranular fracture after annealing treatment. The widmanstatten α phase acted as a barrier for slip movement and improved the crack resistance of grain boundaries.",

keywords = "additive manufacturing, annealing, fracture mechanism, in situ tensile, titanium alloys",

author = "Ming Xu and Huaixue Li and Qi Liu and Feihu Shan and Yongxin Zhang and Wei Guo and Fei Li and Hongqiang Zhang",

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year = "2023",

month = jun,

doi = "10.3390/ma16113973",

language = "英语",

volume = "16",

journal = "Materials",

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T1 - In Situ Tensile Observation of the Effect of Annealing on Fracture Behavior of Laser Additive Manufactured Titanium Alloy

AU - Xu, Ming

AU - Li, Huaixue

AU - Liu, Qi

AU - Shan, Feihu

AU - Zhang, Yongxin

AU - Guo, Wei

AU - Li, Fei

AU - Zhang, Hongqiang

PY - 2023/6

Y1 - 2023/6

N2 - The use safety of laser additive manufactured (LAM) titanium alloys is closely related to each one’s fracture failure mode. In this study, in situ tensile tests were carried out to study the deformation and fracture mechanisms of LAM Ti6Al4V titanium alloy before and after annealing treatment. The results showed that plastic deformation promoted slip bands to occur inside the α phase and shear bands to generate along the α/β interface. In the as-built sample, cracks initiated in the equiaxed grains and propagated along the columnar grain boundary, showing a mixed fracture mode. However, it transformed into a transgranular fracture after annealing treatment. The widmanstatten α phase acted as a barrier for slip movement and improved the crack resistance of grain boundaries.

AB - The use safety of laser additive manufactured (LAM) titanium alloys is closely related to each one’s fracture failure mode. In this study, in situ tensile tests were carried out to study the deformation and fracture mechanisms of LAM Ti6Al4V titanium alloy before and after annealing treatment. The results showed that plastic deformation promoted slip bands to occur inside the α phase and shear bands to generate along the α/β interface. In the as-built sample, cracks initiated in the equiaxed grains and propagated along the columnar grain boundary, showing a mixed fracture mode. However, it transformed into a transgranular fracture after annealing treatment. The widmanstatten α phase acted as a barrier for slip movement and improved the crack resistance of grain boundaries.

KW - additive manufacturing

KW - annealing

KW - fracture mechanism

KW - in situ tensile

KW - titanium alloys

UR - https://www.scopus.com/pages/publications/85161589798

U2 - 10.3390/ma16113973

DO - 10.3390/ma16113973

M3 - 文章

AN - SCOPUS:85161589798

SN - 1996-1944

VL - 16

JO - Materials

JF - Materials

IS - 11

M1 - 3973

ER -

In Situ Tensile Observation of the Effect of Annealing on Fracture Behavior of Laser Additive Manufactured Titanium Alloy

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