本文選題：復(fù)合細(xì)化工藝　切入點(diǎn)：超細(xì)晶工業(yè)純鈦　出處：《稀有金屬材料與工程》2017年07期 　論文類型：期刊論文

【摘要】：室溫下,超細(xì)晶工業(yè)純鈦(UFG CP Ti)光滑試樣在加載頻率f=25 Hz、應(yīng)力比R= 1的條件下進(jìn)行高周應(yīng)力疲勞測(cè)試,擬合超細(xì)晶工業(yè)純鈦應(yīng)力幅σ_a與疲勞斷裂循環(huán)周次Nf之間的關(guān)系曲線,并對(duì)疲勞斷口形貌進(jìn)行觀察分析。結(jié)果表明:200℃退火60 min超細(xì)晶工業(yè)純鈦的疲勞極限值σ-1為376.5 MPa,比未退火超細(xì)晶工業(yè)純鈦的疲勞極限值提高56.5 MPa。疲勞裂紋源萌生于超細(xì)晶工業(yè)純鈦的表面,200℃退火60 min超細(xì)晶工業(yè)純鈦的疲勞輝紋間距較小,疲勞裂紋不易擴(kuò)展,室溫疲勞性能優(yōu)良。
[Abstract]:At room temperature, the high-cycle stress fatigue tests were carried out under the condition of loading frequency f ~ (25) Hz and stress ratio R = 1. The curves between stress amplitude 蟽 _ a and fatigue cycle cycle N _ f of industrial pure titanium were fitted. The fatigue fracture morphology was observed and analyzed. The results show that the fatigue limit 蟽 1 of 60 min annealed at 1: 200 鈩，

本文編號(hào)：1597132