Utmattningsegenskaper hos wolfram vid olika temperaturer
(2013) In Diploma work FKM820 20132Mechanics
- Abstract
- In order to predict the life expectancy for the tungsten target at the planned European spallation source, the fatigue properties of pure tungsten have been studied at room temperature and 300°C. Constant amplitude, stress controlled fatigue tests have been performed to investigate high cycle fatigue and cyclic hardening effects have been studied using multistep, strain controlled fatigue tests. The fatigue limit for rolled tungsten in the rolling direction was found to be in the range 285-300 MPa at room temperature as well as at 300°C. However, these are preliminary results and need to be confirmed by extensive testing.
At 300°C, the tungsten specimens showed relatively more ductility and less notch sensitive behavior. In the... (More) - In order to predict the life expectancy for the tungsten target at the planned European spallation source, the fatigue properties of pure tungsten have been studied at room temperature and 300°C. Constant amplitude, stress controlled fatigue tests have been performed to investigate high cycle fatigue and cyclic hardening effects have been studied using multistep, strain controlled fatigue tests. The fatigue limit for rolled tungsten in the rolling direction was found to be in the range 285-300 MPa at room temperature as well as at 300°C. However, these are preliminary results and need to be confirmed by extensive testing.
At 300°C, the tungsten specimens showed relatively more ductility and less notch sensitive behavior. In the transverse direction, based on limited number of tests, he fatigue limit was found to be in the range 150-165MPa at room temperature. urther testing is required to confirm the reliability of these measurements.
Two forged specimens were tested at room temperature and one of the
specimens could sustain a stress-amplitude of 450MPa without failing.
General conclusions on cyclic hardening effects in the material could not be made with the available data and needs further study. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/4024982
- author
- Elamzon, Jonathan and Tydén, Emil
- supervisor
- organization
- alternative title
- Fatigue Properties of Pure Tungsten at different Temperatures
- course
- FKM820 20132
- year
- 2013
- type
- H2 - Master's Degree (Two Years)
- subject
- publication/series
- Diploma work
- report number
- ISRN LUTFD2/TFMT--13/5043--SE
- ISSN
- ISRN
- language
- English
- id
- 4024982
- date added to LUP
- 2013-09-16 12:33:32
- date last changed
- 2013-09-16 12:33:32
@misc{4024982, abstract = {{In order to predict the life expectancy for the tungsten target at the planned European spallation source, the fatigue properties of pure tungsten have been studied at room temperature and 300°C. Constant amplitude, stress controlled fatigue tests have been performed to investigate high cycle fatigue and cyclic hardening effects have been studied using multistep, strain controlled fatigue tests. The fatigue limit for rolled tungsten in the rolling direction was found to be in the range 285-300 MPa at room temperature as well as at 300°C. However, these are preliminary results and need to be confirmed by extensive testing. At 300°C, the tungsten specimens showed relatively more ductility and less notch sensitive behavior. In the transverse direction, based on limited number of tests, he fatigue limit was found to be in the range 150-165MPa at room temperature. urther testing is required to confirm the reliability of these measurements. Two forged specimens were tested at room temperature and one of the specimens could sustain a stress-amplitude of 450MPa without failing. General conclusions on cyclic hardening effects in the material could not be made with the available data and needs further study.}}, author = {{Elamzon, Jonathan and Tydén, Emil}}, issn = {{ISRN}}, language = {{eng}}, note = {{Student Paper}}, series = {{Diploma work}}, title = {{Utmattningsegenskaper hos wolfram vid olika temperaturer}}, year = {{2013}}, }