316不锈钢原位质子辐照疲劳过程中的声频内耗

Acoustic Internal Friction of 316 Stainless Steel in Fatigue Process with in Situ Proton Irradiation

３１６不锈钢原位质子辐照下疲劳过程中的声频内耗用弯摆在３３３～５７３Ｋ温区和应变振幅为１０￣（－４）量级下进行了研究。结果表明，有质子辐照的疲劳过程中的内耗在较大应变振幅下是与振幅有关的内耗。用应变振幅（２．９２～４．３９）×１０￣（－４）疲劳时，在３７３～４０３Ｋ有微弱的内耗峰出现。有质子辐照疲劳中的内耗明显小于无质子辐照疲劳中的内耗。

Acoustic internal friction of 3 1 6 stainless steel in fatigue process with in situ proton irradiation was studied using flexural pendulum within temperatures 3 3 3～573K and the strain amplitude order is of 10-4.The results show that internal friction in fatigue process with in situ proton irradiation is strain amplitude dependent. The small internal friction peaks in the temperature range of 373～403 Koccurred in fatigue process with the strain amplitudes of(2.92～4.39)×10-4.And the internal frictions are obviously lower in fatigue process with in situ proton irradiation than those without proton irradiation.