扭转试样的氢致滞后开裂

中国腐蚀与防护学报

1984, Vol. 4

Issue (2): 119-124

研究报告

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扭转试样的氢致滞后开裂

褚武扬;张统一;肖纪美

北京钢铁学院;北京钢铁学院;北京钢铁学院

HYDROGEN INDUCED DELAYED CRACKING OF SMOOTH TORSIONAL SPECIMENS

Chu Wuyang Zhang Tongyi Hsiao Chimei(Beijing University of Iron and Steel Technology; China)

全文: PDF(1346 KB)

摘要: 无裂纹扭转试样充氢后在恒定的扭矩作用下能产生氢致滞后开裂。顺时针扭转时裂纹面和扭转轴成45°;反时针扭转则沿-45°面产生裂纹。计算表明,如果氢原子在α-Fe中的应变场是非球对称的,则氢原子的应变场和扭转应力场之间存在有互作用能,而且在45°面(顺时针扭转时)上具有极小值。这就将导致氢原子向45°面扩散和富集,当其浓度达到临界值时就会引起氢致滞后开裂。对于充氢的缺口或预裂纹扭转试样(即Ⅲ型裂纹)上述结论也成立。

Abstract：Hydrogen induced delayed cracking of charged smooth torsional specimens was observed on the planes inclined at an angle of 45° (clockwise twisting) or-45°(counter-clockwise twisting)to the torsional axis, after a large enough torque had been sustained for a long time. Calculation shows that if the strain field of an interstitial hydrogen atom in α-Fe has tetragonal symmetry, the interactive energy between the strain field and the torsional stress field has a minimal value on the planes inclined at an angle of 45°. Hydrogen atoms will diffuse to and be enriched on the planes and then hydrogen induced delayed cracking can occur on the planes, when the hydrogen concentration on the planes reaches a critical value. For a charged notched or cracked torsional specimen, i. e. Type Ⅲ crack, above conclusions are also correct.

收稿日期: 1984-04-25

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引用本文:

褚武扬;张统一;肖纪美. 扭转试样的氢致滞后开裂[J]. 中国腐蚀与防护学报, 1984, 4(2): 119-124.
. HYDROGEN INDUCED DELAYED CRACKING OF SMOOTH TORSIONAL SPECIMENS. J Chin Soc Corr Pro, 1984, 4(2): 119-124.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1984/V4/I2/119

[1] Chu Wuyang(褚武扬);Hsiao Chimei(肖纪美);Li Shiqiong(李世琼),Corrosion,37,320,514(1981)
[2] 褚武扬编著,氢损伤与氢致开裂,第六章,冶金出版社,(待出版)
[3] Thompsom, A. W.; Bernstein, I. M., Hydrogen in Metals, Proceeding of 2-nd JIM International Symposium, 598(1979)
[4] 褚武扬,肖纪美,朱淑彦,王枨,中国腐蚀与防护学报,2,3,15(1982)
[5] Chu Wuyang(褚武扬),Hsiao Chimei(肖纪美),Ju Shuryahn(朱淑彦),Corrosion,38,446(1982)
[6] Hirth, J. P., Met. Trans., 11A, 861(1980)
[7] Li, J. C. M.; Oriani, R. A.; DarKen, L. S., Zeit. Phys. Chem., 49, 271 (1966)

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