|
OALib Journal期刊
ISSN: 2333-9721
费用：99美元
|
|
|
|
氢在铁中的应变场
, PP. 42-50
Abstract:
计算了有应力和无应力状态下产生非球对称应变的氢原于的化学位之差,μ_σ-μ_0=-VΣσ_iε_(ii)~′,其中U就是氢应变场和外应力场的互作用能.对纯剪应力τ,则U=-0.55133Vτ(ε_(11)-ε_(22)),因而当氢在α-Fe中引起四方畸变时,它和剪应力就有互作用,从而可导致氢在45°面上富集,这就可解释充氢的无裂纹扭转试样以及III型裂纹试样能沿45°面产生氢致滞后断裂的实验事实.当非球对称应变的氢择优分布时,在拉伸和压缩条件下的氢浓度公式并不相同,分别为C_t=C_0exp[(0.70089ε_(11)+0.29911ε_(22))Vo/RT],C_0exp[(0.14956ε_(11)+0.85044ε_(22))Vσ/RT].因此,根据氢渗透实验所获得的C_t/C_0和C_p/C_0,就可定出ε_(11)/ε_(22).例如,用Bockris的数据可得ε_(11)/ε_(22)=1.27.这表明氢在α-Fe中的应变是非球对称的.
| [1] | 1 Hirth,J.P.,Metall.Trans.,12A(1981) ,861．
|
| [2] | 2 Li,J.C.M.;Oriani,R.A.;Darken,L.S.,Z.Phys.Chem.,Neue Folge,49(1966) ,271．
|
| [3] | 3 Van Leeuwen,H.P.,A Quantitative Analysis of Hydrogen-Induced Cracking,National Technical Information Service,N77-25307,1976．
|
| [4] | 4 Oriani,R.A.;Josephic,P.H.,Acta Metall.,25(1977) ,979．
|
| [5] | 5 褚武扬;李世琼;肖纪美,金属学报,17(1982) ,10．
|
| [6] | 6 Chu Y.W.(褚武扬);Li S.Q.(李世琼);Hsiao C.M.(肖纪美);Ju S.Y.(朱淑彦),Corrosion,37(1981) ,514．
|
| [7] | 7 John,C.S.T.;Gerberich,W.W.,Metall.Trans.,4(1973) ,589．
|
| [8] | 8 Chu W.Y.(褚武扬);Hsiao C.M.(肖纪美);Ju S.Y.(朱淑彦);Wang C.(王枨),Corrosion,38(1982) ,446．
|
| [9] | 9 褚武扬;肖纪美;王枨;朱淑彦,金属学报,18(1982) ,515．
|
| [10] | 10 Chu W.Y.(褚武扬);Zhang T.Y.(张统一);Hsiao C.M.(肖纪美),Corrosion,40(1984) ,197．
|
| [11] | 11 Bockris,J.O'M.;Beck,W.;Genshan,M.A.;Subramanyan,P.K.;Williams,F.S.,Acta Metall,19(1971) ,1209．
|
| [12] | 12 Li,J.C.M.,Metall.Trans.,9A(1978) ,1351．
|
| [13] | 13 Bockris,J.O'M;Subramanyan,P.K.,Acta Metall.,19(1971) ,1205．
|
| [14] | 14 Hirth,J.P,Stress Corrosion Cracking and Hydrogen Embrittlement of Iron Base Alloy,Eds.Staehle,R.W.,et al,NACE,Houston,1977,p.1．
|
Full-Text
|
|
Contact Us
service@oalib.com QQ:3279437679 
WhatsApp +8615387084133
|
|
