Thermal effect of quench rate on mechanical properties of SIMA 7075-T6
In this study, thermal effects of quench rate on mechanical properties of 7075-T6 alloy fabricated by strain induced melt activation (SIMA) process were investigated. The T6 heat treatments were applied in various parameters after SIMA: solutionizing at 490?C for 15-30-45-60-120 minutes, quenching a...
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Veröffentlicht in: | Thermal science 2023, Vol.27 (4 Part B), p.3199-3208 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this study, thermal effects of quench rate on mechanical properties of
7075-T6 alloy fabricated by strain induced melt activation (SIMA) process
were investigated. The T6 heat treatments were applied in various
parameters after SIMA: solutionizing at 490?C for 15-30-45-60-120 minutes,
quenching at 60-100?C, and aging at 120?C for 12-24-48 hours. Optical and
SEM analyses were performed for characterization, hardness, and tensile
tests for mechanical evaluation. Analysis of variance tests was carried out
to indicate the validity of the interactions quenching temperatures and
tensile properties. Secondary phases were dissolved homogeneously after
solutionizing but at higher quenching temperatures and reprecipitated,
particularly at grain boundaries. Strength values decreased with increasing
quenching temperature. Analysis of variance tests suggest that cryogenic
quenching can further increase the tensile properties. Oxide bifilms,
porosities, low surface quality, and continuous brittle secondary phases
surrounding spheroidal particles reduce the mechanical properties. |
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ISSN: | 0354-9836 2334-7163 |
DOI: | 10.2298/TSCI2304199G |