扫描电镜观察了AerMet100钢中稀土夹杂物的形貌、尺寸;原位观察了单轴拉伸条件下稀土夹杂物的微观力学行为.结果表明:稀土夹杂物呈球状或椭球状,拉伸过程中稀土夹杂物内部最先萌生裂纹.建立了裂纹萌生的应力判据.裂纹在夹杂物内部扩展,不易向基体延伸.数值模拟单轴拉伸试验和理论计算结果与原位观察基本一致.
参考文献
| [1] | YUKITAKA MURAKAM I.Metal fatigue:effects of small and defects nonmetallic inclusions[M].Amsterdam:Elsevier Science,2002 |
| [2] | C. W. Anderson;J. de Mare;H. Rootzen .Methods for estimating the sizes of large inclusions in clean steels[J].Acta materialia,2005(8):2295-2304. |
| [3] | 王习术,梁锋,曾燕屏,谢锡善.夹杂物对超高强度钢低周疲劳裂纹萌生及扩展影响的原位观测[J].金属学报,2005(12):1272-1276. |
| [4] | HANDERHAN K J;GARRISON W M;MOODY N R.Lanthanum additions and the toughness of ultra-high strength steels and the determination of appropriate lanthanum additions[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1989(20):105-123. |
| [5] | 王俊丽,李志,金建军,张济忠,苏斌,古立新.稀土对高纯超高强度23CoNi钢组织与性能影响的初步探索[J].航空材料学报,2006(03):301-302. |
| [6] | HEMPHIL R M;WERT D E .High strength high fracture toughness alloy[P].US 5268044,1993. |
| [7] | KOJI SATO .Improving the toughness of ultrahigh strength steel[D].Berkeley:University of California,2002. |
| [8] | LI Jie;GUO Feng;LI Zhi.Influence sizes of inclusions and voids on fracture toughness of ultra-high strength steel AerMet100[J].Journal of Iron and Steel Research,2007(14):254-258. |
| [9] | 赵晓栋 .钢中大尺寸稀土夹杂物的形成动力学研究[D].山东大学,2004. |
| [10] | 岳丽杰 .Cu-P-RE耐候钢中稀土行为作用及机理的研究[D].东北大学,2006. |
| [11] | TANAKA K;MURAT .A theory of fatigue crack initiation at inclusions[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1982,13(01):117-125. |
| [12] | 郭峰 .稀土夹杂物对高Co-Ni超高强度钢断裂韧度和微观力学行为的影响[D].北京:北京航空材料研究院,2008. |
| [13] | OROWAN N E.In "fatigue and fracture of metals[A].New York:John Wily & Sons,Inc,1952:20-35. |
| [14] | 楼志文.损伤力学基础[M].西安:西安交通大学出版社,1991 |
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