Is it safe to expect an aluminum alloy provide 100000 cycles of service under 80

Question

Is it safe to expect an aluminum alloy provide 100000 cycles of service under 80 ksi stress? Yes No may be Ductile to brittle transition temperature of a steel structures used in extreme cold weathers such as bridge structure in canada is favorable to be As high as possible close to room temperatures as low as possible None of the above Materials with_____crystal structure do not show ductile-to-brittle transition temperature BCC HCP Simple cubic FCC Fracture toughness is the Critical level of stress intensity factor that is independent of the sample thickness Critical level of stress intensity factor that is dependent of the sample thickness Critical level of stress causing elastic deformation of a sample None of the above Strain hardening coefficient is highest in HCP alloys BCC alloys FCC alloy Both BCC and FCC alloys Strain hardening coefficient is lowest in HCP alloys BCC alloys FCC alloy Both BCC and FCC alloys According to the following plot yi

Explanation / Answer

27.A

28.A

29.B

30.C

31. A

32.B

33.C

34.D

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