| CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al——Ⅱ.FRACTURE SURFACE MORPHOLOGY |
| |
| 引用本文： | XIA Yuebo WANG Zhongguang State Key Laboratory for Fatigue and Failure of Materials,Institute of Metal Research,Academia Sinica,Shenyang,China. CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al——Ⅱ.FRACTURE SURFACE MORPHOLOGY[J]. 金属学报(英文版), 1992, 5(5): 330-335 |
| |
| 作者姓名： | XIA Yuebo WANG Zhongguang State Key Laboratory for Fatigue and Failure of Materials Institute of Metal Research Academia Sinica Shenyang China |
| |
| 作者单位： | XIA Yuebo WANG Zhongguang State Key Laboratory for Fatigue and Failure of Materials，Institute of Metal Research，Academia Sinica，Shenyang，China |
| |
| 摘 要： | SEM photos for very coarse grained and high ductile polycrystalline pure Al show followingcharacteristics:A few fracture sources are concentrated,the crack propagates in fan-shapenear them,and the fatigue striations are cyclic cleavage facets.Each striation consists of awide cleavage facet and a narrow cleavage stage.Those stages often blunt due to plasticdeformation.The fatigue striations are clear and continual,and distribute over whole zone ofstage Ⅱ crack propagation.Two kinds of fatigue striations form in different levels,areconjoined by a“twisted baked piece of pastry”band.The secondary crack along the fatiguestriations was observed frequently.Some of them have already developed into secondarymacrocracks and secondary fatigue striations were found clearly on secondary fracture sur-face.The fracture surface can be divided into two parts,initiation and propagation zone of thecrack,however,no statical-fracture zone was observed.The mechanism to form striationswas preliminarily discussed.
|
| 收稿时间： | 1992-10-25 |
| 修稿时间： | 1992-10-25 |
CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al——Ⅱ.FRACTURE SURFACE MORPHOLOGY |
| |
| XIA Yuebo WANG Zhongguang State Key Laboratory for Fatigue and Failure of Materials. CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al——Ⅱ.FRACTURE SURFACE MORPHOLOGY[J]. Acta Metallurgica Sinica(English Letters), 1992, 5(5): 330-335 |
| |
| Authors: | XIA Yuebo WANG Zhongguang State Key Laboratory for Fatigue and Failure of Materials |
| |
| Affiliation: | XIA Yuebo WANG Zhongguang State Key Laboratory for Fatigue and Failure of Materials,Institute of Metal Research,Academia Sinica,Shenyang,China |
| |
| Abstract: | SEM photos for very coarse grained and high ductile polycrystalline pure Al show following characteristics:A few fracture sources are concentrated,the crack propagates in fan-shape near them,and the fatigue striations are cyclic cleavage facets.Each striation consists of a wide cleavage facet and a narrow cleavage stage.Those stages often blunt due to plastic deformation.The fatigue striations are clear and continual,and distribute over whole zone of stage Ⅱ crack propagation.Two kinds of fatigue striations form in different levels,are conjoined by a“twisted baked piece of pastry”band.The secondary crack along the fatigue striations was observed frequently.Some of them have already developed into secondary macrocracks and secondary fatigue striations were found clearly on secondary fracture sur- face.The fracture surface can be divided into two parts,initiation and propagation zone of the crack,however,no statical-fracture zone was observed.The mechanism to form striations was preliminarily discussed. |
| |
| Keywords: | fatigue crack Al fatigue striation secondary crack cleavage tongue |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《金属学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《金属学报(英文版)》下载全文 |
