根据挤压镁合金AZ80人工时效热处理(T5-177℃,16 h)前后分别在空气和NaCl介质中的疲劳寿命,研究了变形镁合金的腐蚀疲劳机理以及β相在腐蚀疲劳中的作用.结果表明:时效可导致AZ80组织β相体积分数增加、拉伸强度和硬度提高,可明显地提高在低应力水平下的腐蚀疲劳寿命.在空气中,疲劳裂纹萌生于表层和亚表面中的夹杂物;而在腐蚀介质中,腐蚀疲劳微裂纹萌生于试样表面的腐蚀坑,点蚀坑萌生于与β相相邻的α相.疲劳断口可见河流花样、二次裂纹、韧窝,具有解理特征.阳极溶解是挤压镁合金AZ80的腐蚀疲劳机制.
参考文献
| [1] | G.S.Cole, How Magnesium Can Achieve High Volume Usage in the Automotive Industry, In: Papers of Sinomag Die Casting Magnesium Seminar Sinochem Beijing Eastern Garden, W. Ding ed., (Beijing, 2000)p.214 |
| [2] | E.M.Gutman, A.Eliezer, Unigovski Ya, E.Abramov, Mater Sci Forum, 419～422, 115(2003) |
| [3] | ZENG Rongchang, KE Wei, XU Yongbo, HAN Enhou, ZHU Ziyong, Acta Metall. Sinica, 37(7), 673(2001)(曾荣昌,柯伟,徐永波,韩恩厚,朱自勇,金属学报,37(7),673(2001)) |
| [4] | U.Noster, B. Scholtes, Mater Sci Forum, 419～422, 103(2003) |
| [5] | Z.B.Sajuri, Y.Miyashita, Y.Mutoh, J.Japan Inst Light Metals, 52(4), 161(2002) |
| [6] | M.Papakyriacou, H.Mayer, U.Fuchs, S.E.Stanzl-Tschegg, R.P. Wei, Fatigue Fract Eng. Mater Struct, 25,795(2002) |
| [7] | V.Ogarevic, R.I.Stephens, Annu Rev Mater Sci, 20, 141(1990) |
| [8] | M.Hilpert, L.Wagner, J. Mater. Eng. Performance (JMEPEG), 9, 402(2000) |
| [9] | L.Wagner, M.Hilpert, J.Wendt, B.Kuster, Mater Sci Forum, 419～422, 93(2003) |
| [10] | T.S.Shih, W.S.LIU, Y.J.Chen, Mater Sci Eng., A325, 152(2002) |
| [11] | R.C.ZENG, W.KE, Y.B.XU, E.H.HAN, Z.Y.ZHU, Trans Mater and Heat Treatment, Oct supple, 71(2001) |
| [12] | ZENG Rongchang, HAN Enhou, KE Wei, LIU Lu, XU Yongbo, Chinese Journal of Materials Research,2004(in Press)(曾荣昌,韩恩厚,柯伟,刘路,徐永波,材料研究学报,待发表) |
| [13] | ZENG Rongchang, HAN Enhou, LIU Lu, XU Yongbo, KE Wei, Chinese Journal of Materials Research,17(3), 241(2003)(曾荣昌,韩恩厚,刘路,徐永波,柯伟,材料研究学报,17(3),241(2003)) |
| [14] | ZENG Rongchang, The Study on Corrosion and Corrosion Fatigue of Wrought Magnesium Alloys, Ph.D Thesis, Institute of Metals Research, Chinese Academy of Sciences, 2003(曾荣昌,变形镁合金的腐蚀与腐蚀疲劳行为研究,博士论文,中国科学院金属研究所,2003) |
| [15] | K.Ishikawa, Y.Kobayashi, T.Kaneko, T.Shibusawa, J. Jpn. Inst. Metals, 61(10), 103(1997) |
| [16] | G.Song, A.Atrens, Adv. Eng. Mater., 1, 11(1999) |
| [17] | R.Kiessling, Non-Metallic Inclusions in Steel, (London, The Metal Society, 1978) p.1988 |
| [18] | WANG Yongzhi, Corros. Sci. and Protection Tech., 1, 1(1996)(王永智,腐蚀科学与防护技术,1,1(1996)) |
| [19] | A.Eliezer, E.M.Gutman, E.Abramov, Unigovski Ya, J. Light Metals, 1, 179(2001) |
| [20] | Shipilov A Sergei, Comparison Between Hydrogen-Induced Corrosion Fatigue Crack Growth Rates and Critical Distances Ahead of a Growing Crack, Corrosion 2000, NACE International, (Houston, 2000) No.00375 |
| [21] | Y.J.Ko, C.D.Yim, J.D.Lim, [K.S.Shin], Mater. Sci. Forum, 419～422, 851(2003) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%