Details
| Original language | English |
|---|---|
| Title of host publication | Special Edition |
| Subtitle of host publication | 10th International Conference on Technology of Plasticity, ICTP 2011 |
| Pages | 1060-1065 |
| Number of pages | 6 |
| Publication status | Published - 2011 |
| Externally published | Yes |
| Event | 10th International Conference on Technology of Plasticity, ICTP 2011 - Aachen, Germany Duration: 25 Sept 2011 → 30 Sept 2011 |
Publication series
| Name | Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011 |
|---|
Abstract
The present study focused on both, the experimental examination of crack growth rates for various microstructures of low alloy 51 CrV 4 steel and the simulation of crack growth In functionally graded shafts manufactured with a newly developed thermo-mechanically coupled forging process. The results demonstrate the dominant Influence of the locally present mlcrostructure on the crack growth behaviour. In fact, unstable crack growth for a pure martensitic microstructure settles in already at a AK value, which characterizes the onset of the Paris regime for bainitic and annealed bainitic-martensitic microstructures. As a result the crack growth in a mlcrostructural optimized shaft ("preheated shaft") having a smooth bainitic-martensitic transition zone was Improved compared to the "standard shaft". Due to the sharp and purely martensitic transition zone In the standard shaft, a change of the pre-heating procedure was suitable to Improve the local mlcrostructure distribution In the final work piece, and thus, enhance the lifetime under cyclic loading conditions. Overall, the present results constitute a step forward towards producing functional graded near-net shape work pieces with optimized local microstructures.
Keywords
- Crack growth, Failure analysis, Mlcrostructure, Simulation, Thermo-mechanical processing
ASJC Scopus subject areas
- Materials Science(all)
- Polymers and Plastics
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Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011. 2011. p. 1060-1065 (Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Crack growth behaviour in functional graded work pieces
AU - Lambers, H. G.
AU - Holzweißig, M.
AU - Schramm, B.
AU - Richard, H. A.
AU - Maier, H. J.
PY - 2011
Y1 - 2011
N2 - The present study focused on both, the experimental examination of crack growth rates for various microstructures of low alloy 51 CrV 4 steel and the simulation of crack growth In functionally graded shafts manufactured with a newly developed thermo-mechanically coupled forging process. The results demonstrate the dominant Influence of the locally present mlcrostructure on the crack growth behaviour. In fact, unstable crack growth for a pure martensitic microstructure settles in already at a AK value, which characterizes the onset of the Paris regime for bainitic and annealed bainitic-martensitic microstructures. As a result the crack growth in a mlcrostructural optimized shaft ("preheated shaft") having a smooth bainitic-martensitic transition zone was Improved compared to the "standard shaft". Due to the sharp and purely martensitic transition zone In the standard shaft, a change of the pre-heating procedure was suitable to Improve the local mlcrostructure distribution In the final work piece, and thus, enhance the lifetime under cyclic loading conditions. Overall, the present results constitute a step forward towards producing functional graded near-net shape work pieces with optimized local microstructures.
AB - The present study focused on both, the experimental examination of crack growth rates for various microstructures of low alloy 51 CrV 4 steel and the simulation of crack growth In functionally graded shafts manufactured with a newly developed thermo-mechanically coupled forging process. The results demonstrate the dominant Influence of the locally present mlcrostructure on the crack growth behaviour. In fact, unstable crack growth for a pure martensitic microstructure settles in already at a AK value, which characterizes the onset of the Paris regime for bainitic and annealed bainitic-martensitic microstructures. As a result the crack growth in a mlcrostructural optimized shaft ("preheated shaft") having a smooth bainitic-martensitic transition zone was Improved compared to the "standard shaft". Due to the sharp and purely martensitic transition zone In the standard shaft, a change of the pre-heating procedure was suitable to Improve the local mlcrostructure distribution In the final work piece, and thus, enhance the lifetime under cyclic loading conditions. Overall, the present results constitute a step forward towards producing functional graded near-net shape work pieces with optimized local microstructures.
KW - Crack growth
KW - Failure analysis
KW - Mlcrostructure
KW - Simulation
KW - Thermo-mechanical processing
UR - http://www.scopus.com/inward/record.url?scp=84898073637&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84898073637
SN - 9783514007840
T3 - Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011
SP - 1060
EP - 1065
BT - Special Edition
T2 - 10th International Conference on Technology of Plasticity, ICTP 2011
Y2 - 25 September 2011 through 30 September 2011
ER -