Effect of treatment in weld surface on fatigue and fracture behavior of titanium alloys welded joints by vacuum electron beam welding

Peng Liu; Ge ming Zhang; T. Zhai; Ke yun Feng

doi:10.1016/j.vacuum.2017.04.019

Effect of treatment in weld surface on fatigue and fracture behavior of titanium alloys welded joints by vacuum electron beam welding

Peng Liu, Ge ming Zhang, T. Zhai, Ke yun Feng

Chemical and Materials Engineering

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

7 Scopus citations

Abstract

The effect of treatment in weld surface on four-point bend fatigue properties and fracture characteristic of Ti–6.5Al–2Zr–1Mo–1V alloy by vacuum electron beam welding were tested and analyzed. When the excess weld metal and excess penetration are removed, the high fatigue strength of joints can be obtained. When the excess weld metal and excess penetration were not removed, the fatigue strength of joints is about 40% of yield strength of base metal. Two kinds of fatigue crack initiations can be observed under the upper surface of joint, which show the obvious local tearing fracture morphology and bulk inclusions or compounds morphology.

Original language	English
Pages (from-to)	176-180
Number of pages	5
Journal	Vacuum
Volume	141
DOIs	https://doi.org/10.1016/j.vacuum.2017.04.019
State	Published - Jul 1 2017

Bibliographical note

Funding Information:
In conclusion, it is obvious that the weld face treated effectively could play an important role to improve the performance of joints. When the weld face of joints was treated, the joints will obtain the high fatigue strength. When only the excess weld metal was removed, the fatigue strength of joints is 444?MPa. It is about 60% of yield strength of base metal. While when the excess weld metal and excess penetration both were not removed, the fatigue strength of joints is 298?MPa. It is about 40% of yield strength of base metal. The fracture of joints shows three typical regions, fatigue crack initiation, fatigue crack propagation and acceleration propagation region and instantaneous failure region. Two kinds of fatigue crack initiations can be observed under the upper surface of joint. This research was financially supported through the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2016JL017) and National Natural Science Foundation of China (Grant No. 51305240).

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

Fatigue
Fracture
Titanium alloy
Vacuum electron beam welding

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films

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10.1016/j.vacuum.2017.04.019

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title = "Effect of treatment in weld surface on fatigue and fracture behavior of titanium alloys welded joints by vacuum electron beam welding",

abstract = "The effect of treatment in weld surface on four-point bend fatigue properties and fracture characteristic of Ti–6.5Al–2Zr–1Mo–1V alloy by vacuum electron beam welding were tested and analyzed. When the excess weld metal and excess penetration are removed, the high fatigue strength of joints can be obtained. When the excess weld metal and excess penetration were not removed, the fatigue strength of joints is about 40% of yield strength of base metal. Two kinds of fatigue crack initiations can be observed under the upper surface of joint, which show the obvious local tearing fracture morphology and bulk inclusions or compounds morphology.",

keywords = "Fatigue, Fracture, Titanium alloy, Vacuum electron beam welding",

author = "Peng Liu and Zhang, {Ge ming} and T. Zhai and Feng, {Ke yun}",

note = "Funding Information: In conclusion, it is obvious that the weld face treated effectively could play an important role to improve the performance of joints. When the weld face of joints was treated, the joints will obtain the high fatigue strength. When only the excess weld metal was removed, the fatigue strength of joints is 444?MPa. It is about 60% of yield strength of base metal. While when the excess weld metal and excess penetration both were not removed, the fatigue strength of joints is 298?MPa. It is about 40% of yield strength of base metal. The fracture of joints shows three typical regions, fatigue crack initiation, fatigue crack propagation and acceleration propagation region and instantaneous failure region. Two kinds of fatigue crack initiations can be observed under the upper surface of joint. This research was financially supported through the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2016JL017) and National Natural Science Foundation of China (Grant No. 51305240). Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

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doi = "10.1016/j.vacuum.2017.04.019",

language = "English",

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T1 - Effect of treatment in weld surface on fatigue and fracture behavior of titanium alloys welded joints by vacuum electron beam welding

AU - Liu, Peng

AU - Zhang, Ge ming

AU - Zhai, T.

AU - Feng, Ke yun

N1 - Funding Information: In conclusion, it is obvious that the weld face treated effectively could play an important role to improve the performance of joints. When the weld face of joints was treated, the joints will obtain the high fatigue strength. When only the excess weld metal was removed, the fatigue strength of joints is 444?MPa. It is about 60% of yield strength of base metal. While when the excess weld metal and excess penetration both were not removed, the fatigue strength of joints is 298?MPa. It is about 40% of yield strength of base metal. The fracture of joints shows three typical regions, fatigue crack initiation, fatigue crack propagation and acceleration propagation region and instantaneous failure region. Two kinds of fatigue crack initiations can be observed under the upper surface of joint. This research was financially supported through the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2016JL017) and National Natural Science Foundation of China (Grant No. 51305240). Publisher Copyright: © 2017 Elsevier Ltd

PY - 2017/7/1

Y1 - 2017/7/1

N2 - The effect of treatment in weld surface on four-point bend fatigue properties and fracture characteristic of Ti–6.5Al–2Zr–1Mo–1V alloy by vacuum electron beam welding were tested and analyzed. When the excess weld metal and excess penetration are removed, the high fatigue strength of joints can be obtained. When the excess weld metal and excess penetration were not removed, the fatigue strength of joints is about 40% of yield strength of base metal. Two kinds of fatigue crack initiations can be observed under the upper surface of joint, which show the obvious local tearing fracture morphology and bulk inclusions or compounds morphology.

AB - The effect of treatment in weld surface on four-point bend fatigue properties and fracture characteristic of Ti–6.5Al–2Zr–1Mo–1V alloy by vacuum electron beam welding were tested and analyzed. When the excess weld metal and excess penetration are removed, the high fatigue strength of joints can be obtained. When the excess weld metal and excess penetration were not removed, the fatigue strength of joints is about 40% of yield strength of base metal. Two kinds of fatigue crack initiations can be observed under the upper surface of joint, which show the obvious local tearing fracture morphology and bulk inclusions or compounds morphology.

KW - Fatigue

KW - Fracture

KW - Titanium alloy

KW - Vacuum electron beam welding

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Effect of treatment in weld surface on fatigue and fracture behavior of titanium alloys welded joints by vacuum electron beam welding

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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