https://orcid.org/0000-0003-0246-969X
Abstract
Accurate representation of fatigue-crack-growth-rate behavior is crucial for predicting the fatigue life of additively manufactured materials in structural applications. In this study, fatigue-crack-growth and fatigue-life behavior of Ti-6Al-4V specimens fabricated via laser directed energy deposition (DED-L) were investigated and compared to their conventionally manufactured counterparts. Compression precracking constant-amplitude and ASTM load-reduction methods were used to generate large-crack growth rate data in the near-threshold (low-rate) regime on standard compact tension (C(T)) specimens. In addition, single-edge-notch-bend (SEN(B)) specimens were used to generate fatigue and small-crack-growth-rate data. Uniaxial fatigue tests were also conducted on flat, KT = 1, dogbone specimens. A plasticity-induced crack closure model, fatigue structural analysis (FASTRAN), was used to predict the fatigue life of the notched and unnotched specimens. The obtained results were also compared to the fatigue life and crack growth behavior of wrought Ti-6Al-4V. The experimental results indicated that crack growth in the SEN(B) specimens was faster than that in the C(T) specimens at higher rates, but comparable in the low-rate near-threshold regime. Furthermore, the fatigue life of DED-L Ti-6Al-4V specimens was successfully predicted using large-crack growth data.
Issue Section:
Technical Papers
References
1.
Thompson
S. M.
, Bian
L.
, Shamsaei
N.
, and Yadollahi
A.
, “An Overview of Direct Laser Deposition for Additive Manufacturing; Part I: Transport Phenomena, Modeling and Diagnostics
,” Additive Manufacturing
8
(2015
): 36
–62
, https://doi.org/10.1016/j.addma.2015.07.0012.
Thijs
L.
, Verhaeghe
F.
, Craeghs
T.
, Humbeeck
J. V.
, and Kruth
J.-P.
, “A Study of the Microstructural Evolution during Selective Laser Melting of Ti–6Al–4V
,” Acta Materialia
58
, no. 9
(May 2010
): 3303
–3312
, https://doi.org/10.1016/j.actamat.2010.02.0043.
Shamsaei
N.
, Yadollahi
A.
, Bian
L.
, and Thompson
S. M.
, “An Overview of Direct Laser Deposition for Additive Manufacturing; Part II: Mechanical Behavior, Process Parameter Optimization and Control
,” Additive Manufacturing
8
(2015
): 12
–35
, https://doi.org/10.1016/j.addma.2015.07.0024.
Yadollahi
A.
and Shamsaei
N.
, “Additive Manufacturing of Fatigue Resistant Materials: Challenges and Opportunities
,” International Journal of Fatigue
98
(2017
): 14
–31
, https://doi.org/10.1016/j.ijfatigue.2017.01.0015.
Aboutaleb
A. M.
, Mahtabi
M. J.
, Tschopp
M. A.
, and Bian
L.
, “Multi-objective Accelerated Process Optimization of Mechanical Properties in Laser-Based Additive Manufacturing: Case Study on Selective Laser Melting (SLM) Ti-6Al-4V
,” Journal of Manufacturing Processes
38
(2019
): 432
–444
, https://doi.org/10.1016/j.jmapro.2018.12.0406.
Aboutaleb
A. M.
, Bian
L.
, Elwany
A.
, Shamsaei
N.
, Thompson
S. M.
, and Tapia
G.
, “Accelerated Process Optimization for Laser-Based Additive Manufacturing by Leveraging Similar Prior Studies
,” IISE Transactions
49
, no. 1
(January 2017
): 31
–44
, https://doi.org/10.1080/0740817X.2016.11896297.
Ranjan
R.
, Samant
R.
, and Anand
S.
, “Integration of Design for Manufacturing Methods with Topology Optimization in Additive Manufacturing
,” Journal of Manufacturing Science and Engineering
139
, no. 6
(June 2017
): 061007, https://doi.org/10.1115/1.40352168.
Stephens
R. I.
, Fatemi
A.
, Stephens
R. R.
, and Fuchs
H. O.
, Metal Fatigue in Engineering
, 2nd ed. (Hoboken, NJ
: Wiley
, 2000
).9.
Gorelik
M.
, “Additive Manufacturing in the Context of Structural Integrity
,” International Journal of Fatigue
94
, Part 2 (January 2017
): 168
–177
, https://doi.org/10.1016/j.ijfatigue.2016.07.00510.
Yadollahi
A.
, Mahmoudi
M.
, Elwany
A.
, Doude
H.
, Bian
L.
, and Newman
J. C.
Jr., “Fatigue-Life Prediction of Additively Manufactured Material: Effects of Heat Treatment and Build Orientation
,” Fatigue & Fracture of Engineering Materials & Structures
43
, no. 4
(April 2020
): 831
–844
, https://doi.org/10.1111/ffe.1320011.
Yadollahi
A.
, Mahmoudi
M.
, Elwany
A.
, Doude
H.
, Bian
L.
, and Newman
J. C.
Jr., “Effects of Crack Orientation and Heat Treatment on Fatigue-Crack-Growth Behavior of AM 17-4 PH Stainless Steel
,” Engineering Fracture Mechanics
226
(2020
): 106874, https://doi.org/10.1016/j.engfracmech.2020.10687412.
Brant
A.
and Sundaram
M. M.
, “A Novel System for Cloud-Based Micro Additive Manufacturing of Metal Structures
,” Journal of Manufacturing Processes
20
, Part 3 (October 2015
): 478
–484
, https://doi.org/10.1016/j.jmapro.2015.06.02013.
Newman
J. C.
Jr., Yamada
Y.
, Ziegler
B. M.
, and Shaw
J. W.
, Small and Large Crack Databases for Rotorcraft Materials, DOT/FAA/TC-12/29
(Washington, DC: Federal Aviation Administration, 2014
).14.
Newman
J. C.
Jr. and Edwards
P. R.
, Short-Crack Growth Behaviour in an Aluminum Alloy–An AGARD Cooperative Test Programme, AGARD-R-732
(Paris
: Advisory Group for Aerospace Research and Development
, 1988
).15.
Yadollahi
A.
, Mahtabi
M. J.
, Khalili
A.
, Doude
H. R.
, and Newman
J. C.
Jr., “Fatigue Life Prediction of Additively Manufactured Material: Effects of Surface Roughness, Defect Size, and Shape
,” Fatigue & Fracture of Engineering Materials & Structures
41
, no. 7
(July 2018
): 1602
–1614
, https://doi.org/10.1111/ffe.1279916.
Dzugan
J.
, Seifi
M.
, Prochazka
R.
, Rund
M.
, Podany
P.
, Konopik
P.
, and Lewandowski
J. J.
, “Effects of Thickness and Orientation on the Small Scale Fracture Behaviour of Additively Manufactured Ti-6Al-4V
,” Materials Characterization
143
(2018
): 94
–109
, https://doi.org/10.1016/j.matchar.2018.04.00317.
Riemer
A.
, Leuders
S.
, Thöne
M.
, Richard
H. A.
, Tröster
T.
, and Niendorf
T.
, “On the Fatigue Crack Growth Behavior in 316L Stainless Steel Manufactured by Selective Laser Melting
,” Engineering Fracture Mechanics
120
(2014
): 15
–25
, https://doi.org/10.1016/j.engfracmech.2014.03.00818.
Konečná
R.
, Kunz
L.
, Bača
A.
, and Nicoletto
G.
, “Long Fatigue Crack Growth in Ti6Al4V Produced by Direct Metal Laser Sintering
,” Procedia Engineering
160
(2016
): 69
–76
, https://doi.org/10.1016/j.proeng.2016.08.86419.
Riemer
A.
, Richard
H. A.
, Brüggemann
J. P.
, and Wesendahl
J. N.
, “Fatigue Crack Growth in Additive Manufactured Products
,” Fracture and Structural Integrity
9
, no. 34
(October 2015
): 437
–446
, https://doi.org/10.3221/IGF-ESIS.34.4920.
Zhai
Y.
, Lados
D. A.
, Brown
E. J.
, and Vigilante
G. N.
, “Fatigue Crack Growth Behavior and Microstructural Mechanisms in Ti-6Al-4V Manufactured by Laser Engineered Net Shaping
,” International Journal of Fatigue
93
, Part 1 (December 2016
): 51
–63
, https://doi.org/10.1016/j.ijfatigue.2016.08.00921.
Gallagher
J. P.
, van Stone
R. H.
, deLaneuville
R. E.
, Gravett
P.
, and Bellows
R. S.
, Improved High-Cycle Fatigue (HCF) Life Prediction, AFRL-ML-WP-TR-2001-4159
(Wright-Patterson Air Force Base, OH
: Air Force Research Laboratory
, 2001
).22.
Newman
J. C.
Jr., Ruschau
J. J.
, and Hill
M. R.
, “Improved Test Method for Very Low Fatigue-Crack-Growth-Rate Data
,” Fatigue & Fracture of Engineering Materials & Structures
34
, no. 4
(April 2011
): 270
–279
, https://doi.org/10.1111/j.1460-2695.2010.01516.x23.
Ruschau
J. J.
and Newman
J. C.
Jr., “Compression Precracking to Generate Near Threshold Fatigue Crack Growth Rates in an Aluminum and Titanium Alloy
,” Journal of ASTM International
5
, no. 7
(July 2008
): 257
–271
, https://doi.org/10.1520/JAI10162324.
Liu
Z.
, He
B.
, Lyu
T.
, and Zou
Y.
, “A Review on Additive Manufacturing of Titanium Alloys for Aerospace Applications: Directed Energy Deposition and beyond Ti-6Al-4V
,” Journal of the Minerals Metals & Materials Society
73
, no. 6
(June 2021
): 1804
–1818
, https://doi.org/10.1007/s11837-021-04670-625.
Zhai
Y.
, Galarraga
H.
, and Lados
D. A.
, “Microstructure, Static Properties, and Fatigue Crack Growth Mechanisms in Ti-6Al-4V Fabricated by Additive Manufacturing: LENS and EBM
,” Engineering Failure Analysis
69
(2016
): 3
–14
, https://doi.org/10.1016/j.engfailanal.2016.05.03626.
Newman
J. C.
Jr., “FASTRAN—A Fatigue Crack Growth Life-Prediction Code Based on the Crack-Closure Concept
,” in Version 5.4 User Guide
(Europa, MS: Fatigue and Fracture Associates LLC, 2013
).27.
Standard Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials
, ASTM E466–21 (West Conshohocken, PA: ASTM International
, approved June 1, 2021
), https://doi.org/10.1520/E466-2128.
Standard Test Method for Measurement of Fatigue Crack Growth Rates
, ASTM E647–23b (West Conshohocken, PA: ASTM International
, approved November 15, 2023
), https://doi.org/10.1520/E647-23b29.
Lütjering
G.
, “Influence of Processing on Microstructure and Mechanical Properties of (α+β) Titanium Alloys
,” Materials Science and Engineering: A
243
, nos. 1–2
(March 1998
): 32
–45
, https://doi.org/10.1016/S0921-5093(97)00778-830.
Zheng
B.
, Zhou
Y.
, Smugeresky
J. E.
, Schoenung
J. M.
, and Lavernia
E. J.
, “Thermal Behavior and Microstructural Evolution During Laser Deposition with Laser-Engineered Net Shaping: Part I. Numerical Calculations
,” Metallurgical and Materials Transactions A
39
, no. 9
(September 2008
): 2228
–2236
, https://doi.org/10.1007/s11661-008-9557-731.
Bontha
S.
, Klingbeil
N. W.
, Kobryn
P. A.
, and Fraser
H. L.
, “Thermal Process Maps for Predicting Solidification Microstructure in Laser Fabrication of Thin-Wall Structures
,” Journal of Materials Processing Technology
178
, nos. 1–3
(September 2006
): 135
–142
, https://doi.org/10.1016/j.jmatprotec.2006.03.15532.
Selcuk
C.
, “Laser Metal Deposition for Powder Metallurgy Parts
,” Powder Metallurgy
54
, no. 2
(April 2011
): 94
–99
, https://doi.org/10.1179/174329011X1297787458992433.
Bache
M. R.
, Evans
W. J.
, Suddell
B.
, and Herrouin
F. R. M.
, “The Effects of Texture in Titanium Alloys for Engineering Components under Fatigue
,” International Journal of Fatigue
23
, Supplement 1
(January 2001
): 153
–159
, https://doi.org/10.1016/S0142-1123(01)00124-434.
Bantounas
I.
, Lindley
T. C.
, Rugg
D.
, and Dye
D.
, “Effect of Microtexture on Fatigue Cracking in Ti–6Al–4V
,” Acta Materialia
55
, no. 16
(September 2007
): 5655
–5665
, https://doi.org/10.1016/j.actamat.2007.06.03435.
Hazell
P. J.
, Appleby-Thomas
G. J.
, Wielewski
E.
, and Escobedo
J. P.
, “The Shock and Spall Response of Three Industrially Important Hexagonal Close-Packed Metals: Magnesium, Titanium and Zirconium
,” Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
372
, no. 2023
(August 2014
): 20130204, https://doi.org/10.1098/rsta.2013.020436.
Le Biavant
K.
, Pommier
S.
, and Prioul
C.
, “Local Texture and Fatigue Crack Initiation in a Ti-6Al-4V Titanium Alloy
,” Fatigue & Fracture of Engineering Materials & Structures
25
, no. 6
(June 2002
): 527
–545
, https://doi.org/10.1046/j.1460-2695.2002.00480.x37.
Pilchak
A.
, Bhattacharjee
A.
, Williams
R. E. A.
, and Williams
J. C.
, “The Effect of Microstructure on Fatigue Crack Initiation in Ti-6Al-4V
,” in 12th International Conference on Fracture (ICF-12)
, Volume 5
(Ottawa, Canada
: National Research Council Canada
, 2009
), 3737
–3747
.38.
Pippan
R.
, “The Growth of Short Cracks under Cyclic Compression
,” Fatigue & Fracture of Engineering Materials & Structures
9
, no. 5
(May 1987
): 319
–328
, https://doi.org/10.1111/j.1460-2695.1987.tb00459.x39.
Newman
J. C.
Jr., Schneider
J.
, Daniel
A.
, and McKnight
D.
, “Compression Pre-cracking to Generate Near Threshold Fatigue-Crack-Growth Rates in Two Aluminum Alloys
,” International Journal of Fatigue
27
, nos. 10–12
(October–December 2005
): 1432
–1440
, https://doi.org/10.1016/j.ijfatigue.2005.07.00640.
Newman
J. C.
Jr. and Yamada
Y.
, “Compression Precracking Methods to Generate Near-Threshold Fatigue-Crack-Growth-Rate Data
,” International Journal of Fatigue
32
, no. 6
(June 2010
): 879
–885
, https://doi.org/10.1016/j.ijfatigue.2009.02.03041.
Newman
J. C.
Jr., “A Crack-Closure Model for Predicting Fatigue Crack Growth under Aircraft Spectrum Loading
,” in Methods and Models for Predicting Fatigue Crack Growth under Random Loading
, eds. Chang
J. B.
and Hudson
C. M.
(West Conshohocken, PA: ASTM International
, 1981
), 53
–84
, https://doi.org/10.1520/STP28334S42.
McClung
R. C.
, “Finite Element Analysis of Specimen Geometry Effects on Fatigue Crack Closure
,” Fatigue & Fracture of Engineering Materials & Structures
17
, no. 8
(August 1994
): 861
–872
, https://doi.org/10.1111/j.1460-2695.1994.tb00816.x43.
Dugdale
D. S.
, “Yielding of Steel Sheets Containing Slits
,” Journal of the Mechanics and Physics of Solids
8
, no. 2
(May 1960
): 100
–104
, https://doi.org/10.1016/0022-5096(60)90013-244.
Elber
W.
, “Fatigue Crack Closure under Cyclic Tension
,” Engineering Fracture Mechanics
2
, no. 1
(July 1970
): 37
–44
, https://doi.org/10.1016/0013-7944(70)90028-745.
Elber
W.
, “The Significance of Fatigue Crack Closure
,” in Damage Tolerance in Aircraft Structures
(West Conshohocken, PA: ASTM International, 1971
): 230
–242
, https://doi.org/10.1520/STP26680S46.
Newman
J. C.
Jr., “A Crack Opening Stress Equation for Fatigue Crack Growth
,” International Journal of Fracture
24
, no. 4
(April 1984
): R131
–R135
, https://doi.org/10.1007/BF0002075147.
Tada
H.
, Paris
P. C.
, and Irwin
G. R.
, “The Stress Analysis of Cracks
,” 3rd ed. (New York
: American Society of Mechanical Engineers
, 1973
).48.
Newman
J. C.
Jr., “Fracture Analysis of Various Cracked Configurations in Sheet and Plate Materials
,” in Properties Related to Fracture Toughness
, eds. Weiss
V.
and Warke
W. R.
(West Conshohocken, PA: ASTM International
, 1976
).49.
Mahtabi
M. J.
, Sanford
A.
, Shamsaei
N.
, and Newman
J. C.
Jr., “Transferability of the Two-Parameter Fracture Criterion for 2219 Aluminium Alloy Cracked Configurations
,” Fatigue & Fracture of Engineering Materials & Structures
39
, no. 3
(March 2016
): 335
–345
, https://doi.org/10.1111/ffe.1235950.
Newman
J. C.
Jr., Kota
K.
, and Lacy
T. E.
, “Fatigue and Crack-Growth Behavior in a Titanium Alloy under Constant-Amplitude and Spectrum Loading
,” Engineering Fracture Mechanics
187
(2018
): 211
–224
, https://doi.org/10.1016/j.engfracmech.2017.10.036
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