高强钢氢脆敏感性和氢致附加应力的相关性
Relationship between Hydrogen-induced Additive Stress and Threshold Cracking Stress for a High-strength Steel
摘 要
采用慢应变速率试验(SSRT)研究了高强钢40CrMoTi的氢脆敏感性与氢致附加应力的关系.试验表明,氢致附加应力σad随试样的屈服强度σs以及固溶氢浓度C0的对数的增加而线性升高,其关系为,σad=-260+0.226σs + 63.9 lnC0,高强钢恒载荷下氢致滞后断裂门槛应力随氢浓度对数的升高而线性下降,即,σHIC=863-145 lnC0(σs=900 MPa),σHIC=891-183 lnC0(σs=1 050 MPa).预充氢试样慢应变速率拉伸时的相对断裂应力σF(H)/σF随氢浓度对数的升高而线性下降,即,σF(H)/σF=0.97-0.18 lnC0(σs=900 MPa),σF(H)/σF=0.95-0.24 lnC0(σs=1 050 MPa).
氢致附加应力
氢致滞后断裂门槛应力
high-strength steel
hydrogen-induced additive stress
hydrogen-induced threshold stress
Abstract
The relationship between hydrogen induced additive stress and threshold cracking stress of high strength steel 40CrMoTi was studied using SSRT.The hydrogen-induced additive stress,σad,increased linearly with the increase of both yield strength and logarithm of hydrogen concentration for the samples,i.e,σad=-260+0.226σys+63.9 lnC0.The threshold stress decreased with the increase of logarithm of hydrogen concentration for the samples,i.e,σHIC=863-145 lnC0(σs=900 MPa),σHIC=891-183 lnC0(σs=1 050 MPa).The relative fracture stress σF(H)/σF during charging with hydrogen decreased with the increase of logarithm of hydrogen concentration for the samples,i.e,σF(H)/σF=0.97-0.18 lnC0(σs=900 MPa),σF(H)/σF=0.95-0.24 lnC0(σs=1 050 MPa).
中图分类号 TG171
所属栏目 试验研究
基金项目 国家重大基础研究规划项目(G19990650);国家自然科学基金(No50071010)资助
收稿日期 2008/9/15
修改稿日期 2008/9/25
网络出版日期
作者单位点击查看
备注李会录,副教授.
引用该论文: LI Hui-lu,YU Zhu-huan,LI Ying,CHU Wu-yang,QIAO Li-jie. Relationship between Hydrogen-induced Additive Stress and Threshold Cracking Stress for a High-strength Steel[J]. Corrosion & Protection, 2009, 30(10): 678～683
被引情况:
【1】翟建明,李晓阳,吴明耀,张亦良, "45号钢在硫化氢水溶液中的腐蚀行为",腐蚀与防护 34, 1013-1018(2013)
【2】张海兵,马力,闫永贵,程文华,袁亚民, "17-4PH不锈钢的析氢行为",腐蚀与防护 37, 317-320(2016)
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【7】Abraham D P,Altstetter C J.Hydrogen-enhanced localization of plasticity in an austenitic stainless steel[J].Metall Mater Trans,1995,26A:2849.
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【13】Lu K,Wei W D,Wang J T.Microhardness and fracture properties of nanocrystalline Ni-P alloys[J].Scripta Metall Mater,1990,24(12);2319-2323.
【14】Sandera P,Pokluda J,Wang M Sob.Calculation of theoretical strength of solids by linear muffin-tin orbitals (LMTO) method[J].Sci Eng,1997,A234-236:370.
【15】Li J C M,Park C G,Ohr S M.Chemical driving force for dislocation motion in hydrogen embrittlement[J].Scripta Metall,1986,20(371):1447.
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