Details
| Original language | English |
|---|---|
| Pages (from-to) | 300-307 |
| Number of pages | 8 |
| Journal | International journal of fatigue |
| Volume | 48 |
| Publication status | Published - 28 Nov 2012 |
| Externally published | Yes |
Abstract
Direct manufacturing (DM), also referred to as additive manufacturing or additive layer manufacturing, has recently gained a lot of interest due to the feasibility of producing light-weight metallic components directly from design data. Selective laser melting is a very promising DM technique for providing near net shape components with relative high surface quality and bulk density. Still, process induced imperfections, i.e. micron sized pores and residual stresses upon processing, need to be considered for future application, e.g. in the aerospace and biomedical sectors. Moreover, fatigue loading is a critical scenario for such components and needs to be investigated thoroughly. Consequently, the current study aims at establishing sound microstructure- defect-property relationships under cyclic loading for a TiAl6V4 alloy processed by selective laser melting. Employing mechanical testing, hot isostatic pressing, electron microscopy and computer tomography it is shown that the micron sized pores mainly affect fatigue strength, while residual stresses have a strong impact on fatigue crack growth.
Keywords
- Direct manufacturing, HCF, Heat treatment, HIP, Microstructure
ASJC Scopus subject areas
- Mathematics(all)
- Modelling and Simulation
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: International journal of fatigue, Vol. 48, 28.11.2012, p. 300-307.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting
T2 - Fatigue resistance and crack growth performance
AU - Leuders, S.
AU - Thöne, M.
AU - Riemer, A.
AU - Niendorf, T.
AU - Tröster, T.
AU - Richard, H. A.
AU - Maier, H. J.
N1 - Funding information: The authors would like to thank the Direct Manufacturing Research Center (DMRC), its industry partners and the state of North Rhine Westphalia for financial support of the present study.
PY - 2012/11/28
Y1 - 2012/11/28
N2 - Direct manufacturing (DM), also referred to as additive manufacturing or additive layer manufacturing, has recently gained a lot of interest due to the feasibility of producing light-weight metallic components directly from design data. Selective laser melting is a very promising DM technique for providing near net shape components with relative high surface quality and bulk density. Still, process induced imperfections, i.e. micron sized pores and residual stresses upon processing, need to be considered for future application, e.g. in the aerospace and biomedical sectors. Moreover, fatigue loading is a critical scenario for such components and needs to be investigated thoroughly. Consequently, the current study aims at establishing sound microstructure- defect-property relationships under cyclic loading for a TiAl6V4 alloy processed by selective laser melting. Employing mechanical testing, hot isostatic pressing, electron microscopy and computer tomography it is shown that the micron sized pores mainly affect fatigue strength, while residual stresses have a strong impact on fatigue crack growth.
AB - Direct manufacturing (DM), also referred to as additive manufacturing or additive layer manufacturing, has recently gained a lot of interest due to the feasibility of producing light-weight metallic components directly from design data. Selective laser melting is a very promising DM technique for providing near net shape components with relative high surface quality and bulk density. Still, process induced imperfections, i.e. micron sized pores and residual stresses upon processing, need to be considered for future application, e.g. in the aerospace and biomedical sectors. Moreover, fatigue loading is a critical scenario for such components and needs to be investigated thoroughly. Consequently, the current study aims at establishing sound microstructure- defect-property relationships under cyclic loading for a TiAl6V4 alloy processed by selective laser melting. Employing mechanical testing, hot isostatic pressing, electron microscopy and computer tomography it is shown that the micron sized pores mainly affect fatigue strength, while residual stresses have a strong impact on fatigue crack growth.
KW - Direct manufacturing
KW - HCF
KW - Heat treatment
KW - HIP
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=84876706197&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2012.11.011
DO - 10.1016/j.ijfatigue.2012.11.011
M3 - Article
AN - SCOPUS:84876706197
VL - 48
SP - 300
EP - 307
JO - International journal of fatigue
JF - International journal of fatigue
SN - 0142-1123
ER -