Anisotropy of the fatigue behavior of extruded and rolled magnesium alloys |
| |
| Affiliation: | 1. Dept. of Mechanical Engineering, University of Toyama, Toyama 930-8555, Japan;2. Toyama National College of Technology, Toyama 933-0293, Japan;3. Dept. of Materials Science and Engineering, University of Toyama, Toyama 930-8555, Japan;1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an, 710072, China;2. School of Materials, The University of Manchester, Manchester, M13 9PL, UK;3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;1. National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China;2. University of Nevada, Department of Mechanical Engineering (312), Reno, NV 89557, USA;3. Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China;1. School of Materials Science and Engineering, Dalian University of Technology, 116024 Dalian, China;2. School of Materials Science and Engineering, Shenyang Aerospace University, South Avenue of Daoyi, 110136 Shenyang, China;3. Laboratory of Excellence on Design of Alloy Metals for low-Mass Structures (DAMAS), Université de Lorraine, 57045 Metz, France;1. Deparment of Mechanical & Mechatronics Engineering, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada;2. Department of Aerospace Engineering, Sharif University of Technology, Azadi Street, Tehran, Iran;1. Department of Mechanical & Mechatronics Engineering, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada;2. CanmetMATERIALS, Natural Resources Canada, 183 Longwood Road South, Hamilton, ON L8P 0A1, Canada |
| |
| Abstract: | Fatigue tests were conducted using both extruded and rolled magnesium alloys AZ31 to study anisotropy of the fatigue behavior of the alloys. For the above purpose, two types of specimens whose longitudinal axes are parallel (E specimen) and perpendicular (T specimen) to the extrusion direction were prepared for the extruded Mg alloy. For the rolled Mg alloy, three types of specimens, whose longitudinal axes are parallel (R specimen) and perpendicular (T and S specimens) to the rolling direction, were prepared. S–N curves and crack propagation characteristics for both the extruded and rolled specimens with different longitudinal directions were studied to investigate the effects of the texture, microstructures and residual stresses on the fatigue behavior of the magnesium alloy AZ31. Anisotropy of the fatigue behavior was observed for both the extruded and the rolled magnesium alloys. In the extruded Mg alloy, differences in both fatigue lives and fatigue limit exist between E and T specimens. The fatigue resistance for the former is superior to that of the latter. In the rolled Mg alloy, lesser differences were found between R and T specimens. However, fatigue lives of the S specimens were clearly shorter than those of the former at the high stress amplitudes above the fatigue limit. In the extruded Mg alloy, the rod-like microstructure observed is an important factor contributing to the anisotropy of the fatigue behavior of the alloy. While in the rolled Mg alloy, the texture induced during processing is considered to play a dominant role in the anisotropy of the fatigue behavior of the alloy. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
