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8.17 2014-T6 alamndan (ekil 8.34) retilmi 12,5 mm apl silindirik bir ubuk, eksenel dorultuda tekrarl ekme-basma yklerin etkisi altndadr. ubuun 1 x 107 evrim

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8.17 2014-T6 alamndan (ekil 8.34) retilmi 12,5 mm apl silindirik bir ubuk, eksenel dorultuda tekrarl ekme-basma yklerin etkisi altndadr. ubuun 1 x 107 evrim saysna karlk gelen bir yorulma mr sergilemesi iin, uygulanmas gereken maksimum ve minimum ykleri hesap- laynz. ekil 8.34'teki grafiin dey ekseninin, gerilme genliini gsterdiini ve verilerin 50 MPa'lk ortalama gerilme deeri iin elde edilmi olduunu kabul ediniz. 8.34 Nikel iin 1000C (1273K)'deki kararl srnme hz deerleri aadaki tabloda verilmitir: (s) 1074 [MPa] 1076 15 4,5 Srnme iin aktivasyon enerjisi 272 000 J/mol olduu bilindiine gre, 850C (1123 K) scaklk

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