Fatigue crack growth behaviour in laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy

Songsong Lu; Rui Bao; Kai Wang; Dong Liu; Yanzeng Wu; Binjun Fei

doi:10.1016/j.msea.2017.03.001

Fatigue crack growth behaviour in laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy

Songsong Lu
, Rui Bao^*
, Kai Wang
, Dong Liu
, Yanzeng Wu
, Binjun Fei

^*Corresponding author for this work

Key Laboratory of Precision Opto-Mechatronics Technology (Ministry of Education)
Beihang University

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

37 Scopus citations

Abstract

Experimental investigates on the fatigue crack growth behaviour along the deposition direction in a laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under constant amplitude loading was carried out. A periodic fluctuation in the crack growth rate was observed which resulted from the layered structure with heat-affected bands (HABs). Macro- and micro-fracture characteristics are discussed in this paper to reveal the relationship between the crack growth rate fluctuation with the HABs and the crack deceleration and acceleration mechanisms. The crack growth rate fluctuations change little with the increase of crack lengths and the difference in test loads.

Original language	English
Pages (from-to)	378-386
Number of pages	9
Journal	Materials Science and Engineering: A
Volume	690
DOIs	https://doi.org/10.1016/j.msea.2017.03.001
State	Published - 6 Apr 2017

Keywords

Damage tolerance
Fatigue crack growth
Laser-melting deposition
Periodic
Titanium alloy

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10.1016/j.msea.2017.03.001

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title = "Fatigue crack growth behaviour in laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy",

abstract = "Experimental investigates on the fatigue crack growth behaviour along the deposition direction in a laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under constant amplitude loading was carried out. A periodic fluctuation in the crack growth rate was observed which resulted from the layered structure with heat-affected bands (HABs). Macro- and micro-fracture characteristics are discussed in this paper to reveal the relationship between the crack growth rate fluctuation with the HABs and the crack deceleration and acceleration mechanisms. The crack growth rate fluctuations change little with the increase of crack lengths and the difference in test loads.",

keywords = "Damage tolerance, Fatigue crack growth, Laser-melting deposition, Periodic, Titanium alloy",

author = "Songsong Lu and Rui Bao and Kai Wang and Dong Liu and Yanzeng Wu and Binjun Fei",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = apr,

day = "6",

doi = "10.1016/j.msea.2017.03.001",

language = "英语",

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TY - JOUR

T1 - Fatigue crack growth behaviour in laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy

AU - Lu, Songsong

AU - Bao, Rui

AU - Wang, Kai

AU - Liu, Dong

AU - Wu, Yanzeng

AU - Fei, Binjun

PY - 2017/4/6

Y1 - 2017/4/6

N2 - Experimental investigates on the fatigue crack growth behaviour along the deposition direction in a laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under constant amplitude loading was carried out. A periodic fluctuation in the crack growth rate was observed which resulted from the layered structure with heat-affected bands (HABs). Macro- and micro-fracture characteristics are discussed in this paper to reveal the relationship between the crack growth rate fluctuation with the HABs and the crack deceleration and acceleration mechanisms. The crack growth rate fluctuations change little with the increase of crack lengths and the difference in test loads.

AB - Experimental investigates on the fatigue crack growth behaviour along the deposition direction in a laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under constant amplitude loading was carried out. A periodic fluctuation in the crack growth rate was observed which resulted from the layered structure with heat-affected bands (HABs). Macro- and micro-fracture characteristics are discussed in this paper to reveal the relationship between the crack growth rate fluctuation with the HABs and the crack deceleration and acceleration mechanisms. The crack growth rate fluctuations change little with the increase of crack lengths and the difference in test loads.

KW - Damage tolerance

KW - Fatigue crack growth

KW - Laser-melting deposition

KW - Periodic

KW - Titanium alloy

UR - https://www.scopus.com/pages/publications/85014803451

U2 - 10.1016/j.msea.2017.03.001

DO - 10.1016/j.msea.2017.03.001

M3 - 文章

AN - SCOPUS:85014803451

SN - 0921-5093

VL - 690

SP - 378

EP - 386

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Fatigue crack growth behaviour in laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy

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Keywords

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