Details
| Original language | English |
|---|---|
| Title of host publication | ASTM Special Technical Publication |
| Publisher | ASTM International |
| Pages | 53-68 |
| Number of pages | 16 |
| Edition | 1371 |
| ISBN (print) | 0803128533 |
| Publication status | Published - 2000 |
| Externally published | Yes |
| Event | The Symposium of 'Thermo-Mechanical Fatigue Behavior of Materials: Third Volume' - Norfolk, VA, USA Duration: 4 Nov 1998 → 5 Nov 1998 |
Publication series
| Name | ASTM Special Technical Publication |
|---|---|
| Number | 1371 |
| ISSN (Print) | 1040-3094 |
Abstract
Thermomechanical fatigue and isothermal deformation experiments were conducted on cast Al 319 alloys with small secondary arm spacings (SDAS) in the range of 25 to 35 μm. The alloy was studied in the overaged state designated as T7B. In the case of the T7B treatment the material possesses dimensional stability, but incurs considerable loss of strength with time and cyclic deformation at temperatures exceeding 250°C. A two-state variable unified constitutive model was developed to characterize the stress-strain response for the material. The model handles temperature and strain rate effects and captures the microstructurally induced changes on the stress-strain response. The thermomechanical fatigue response under in-phase (TMF IP) and out-of-phase (TMF OP) conditions was simulated and the material exhibited a decrease in the stress range by as much as 50% with continued cycling. The decrease in strength was attributed to the significant coarsening of the precipitates at high temperatures and was confirmed by transmission electron microscopy.
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
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ASTM Special Technical Publication. 1371. ed. ASTM International, 2000. p. 53-68 (ASTM Special Technical Publication; No. 1371).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Thermo-mechanical deformation of A1319 - T7B with small secondary dendrite arm spacing
AU - Sehitoglu, Huseyin
AU - Smith, Tracy J.
AU - Maier, Hans J.
PY - 2000
Y1 - 2000
N2 - Thermomechanical fatigue and isothermal deformation experiments were conducted on cast Al 319 alloys with small secondary arm spacings (SDAS) in the range of 25 to 35 μm. The alloy was studied in the overaged state designated as T7B. In the case of the T7B treatment the material possesses dimensional stability, but incurs considerable loss of strength with time and cyclic deformation at temperatures exceeding 250°C. A two-state variable unified constitutive model was developed to characterize the stress-strain response for the material. The model handles temperature and strain rate effects and captures the microstructurally induced changes on the stress-strain response. The thermomechanical fatigue response under in-phase (TMF IP) and out-of-phase (TMF OP) conditions was simulated and the material exhibited a decrease in the stress range by as much as 50% with continued cycling. The decrease in strength was attributed to the significant coarsening of the precipitates at high temperatures and was confirmed by transmission electron microscopy.
AB - Thermomechanical fatigue and isothermal deformation experiments were conducted on cast Al 319 alloys with small secondary arm spacings (SDAS) in the range of 25 to 35 μm. The alloy was studied in the overaged state designated as T7B. In the case of the T7B treatment the material possesses dimensional stability, but incurs considerable loss of strength with time and cyclic deformation at temperatures exceeding 250°C. A two-state variable unified constitutive model was developed to characterize the stress-strain response for the material. The model handles temperature and strain rate effects and captures the microstructurally induced changes on the stress-strain response. The thermomechanical fatigue response under in-phase (TMF IP) and out-of-phase (TMF OP) conditions was simulated and the material exhibited a decrease in the stress range by as much as 50% with continued cycling. The decrease in strength was attributed to the significant coarsening of the precipitates at high temperatures and was confirmed by transmission electron microscopy.
UR - http://www.scopus.com/inward/record.url?scp=0033889074&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0033889074
SN - 0803128533
T3 - ASTM Special Technical Publication
SP - 53
EP - 68
BT - ASTM Special Technical Publication
PB - ASTM International
T2 - The Symposium of 'Thermo-Mechanical Fatigue Behavior of Materials: Third Volume'
Y2 - 4 November 1998 through 5 November 1998
ER -