Residual stress relaxation in shot peened Timetal 21s

M. C. Berger; J. K. Gregory

doi:10.1016/s0921-5093(98)01165-4

Residual stress relaxation in shot peened Timetal 21s

M. C. Berger, J. K. Gregory

Informatics 19 - Assistant Professorship of Legal Tech

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

Selective surface aging treatments (mechanical surface treatment followed by aging) on β-titanium alloys can result in higher endurance limits than conventional mechanical surface treatments. An explanation of fatigue behaviour of selectively surface aged parts should not only consider preferential precipitation strengthening but also take into account the remaining residual stresses. The β-titanium alloy Timetal 21s with two oxygen contents (0.15 and 0.30 wt%), in two solution treated conditions (fully and partially recrystallized) was aged at temperatures between 350 and 500°C after shot peening. Microhardness and X-Ray measurements allowed the determination of the degree of precipitation strengthening and relaxation of residual stresses, respectively, in the near surface regions during aging.

Original language	English
Pages (from-to)	200-204
Number of pages	5
Journal	Materials Science and Engineering A
Volume	263
Issue number	2
DOIs	https://doi.org/10.1016/s0921-5093(98)01165-4
State	Published - 15 May 1999

Keywords

Microhardness
Timetal 21s
X-ray
β-Titanium alloys

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10.1016/s0921-5093(98)01165-4

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title = "Residual stress relaxation in shot peened Timetal 21s",

abstract = "Selective surface aging treatments (mechanical surface treatment followed by aging) on β-titanium alloys can result in higher endurance limits than conventional mechanical surface treatments. An explanation of fatigue behaviour of selectively surface aged parts should not only consider preferential precipitation strengthening but also take into account the remaining residual stresses. The β-titanium alloy Timetal 21s with two oxygen contents (0.15 and 0.30 wt%), in two solution treated conditions (fully and partially recrystallized) was aged at temperatures between 350 and 500°C after shot peening. Microhardness and X-Ray measurements allowed the determination of the degree of precipitation strengthening and relaxation of residual stresses, respectively, in the near surface regions during aging.",

keywords = "Microhardness, Timetal 21s, X-ray, β-Titanium alloys",

author = "Berger, {M. C.} and Gregory, {J. K.}",

note = "Funding Information: The authors would like to thank the Deutsche Forschungsgemeinschaft for its financial support through contract Gr 974/2-1.",

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AU - Berger, M. C.

AU - Gregory, J. K.

N1 - Funding Information: The authors would like to thank the Deutsche Forschungsgemeinschaft for its financial support through contract Gr 974/2-1.

PY - 1999/5/15

Y1 - 1999/5/15

N2 - Selective surface aging treatments (mechanical surface treatment followed by aging) on β-titanium alloys can result in higher endurance limits than conventional mechanical surface treatments. An explanation of fatigue behaviour of selectively surface aged parts should not only consider preferential precipitation strengthening but also take into account the remaining residual stresses. The β-titanium alloy Timetal 21s with two oxygen contents (0.15 and 0.30 wt%), in two solution treated conditions (fully and partially recrystallized) was aged at temperatures between 350 and 500°C after shot peening. Microhardness and X-Ray measurements allowed the determination of the degree of precipitation strengthening and relaxation of residual stresses, respectively, in the near surface regions during aging.

AB - Selective surface aging treatments (mechanical surface treatment followed by aging) on β-titanium alloys can result in higher endurance limits than conventional mechanical surface treatments. An explanation of fatigue behaviour of selectively surface aged parts should not only consider preferential precipitation strengthening but also take into account the remaining residual stresses. The β-titanium alloy Timetal 21s with two oxygen contents (0.15 and 0.30 wt%), in two solution treated conditions (fully and partially recrystallized) was aged at temperatures between 350 and 500°C after shot peening. Microhardness and X-Ray measurements allowed the determination of the degree of precipitation strengthening and relaxation of residual stresses, respectively, in the near surface regions during aging.

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KW - Timetal 21s

KW - X-ray

KW - β-Titanium alloys

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Residual stress relaxation in shot peened Timetal 21s

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Keywords

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