| ZHANG Qian-ru,FU Ge-yan.Research of Resistance to Plastic Deformation of Iron-Nickel Gradient Materials under the Low and Repeated Impact Stress[J],43(6):28-32 |
| Research of Resistance to Plastic Deformation of Iron-Nickel Gradient Materials under the Low and Repeated Impact Stress |
| Received:July 02, 2014 Revised:December 10, 2014 |
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| DOI： |
| KeyWord:repeated impact under low stress plastic deformation gradient material |
| Author | Institution |
| ZHANG Qian-ru |
Mechanical and Electrical Engineering, Soochow University, Suzhou , China |
| FU Ge-yan |
Mechanical and Electrical Engineering, Soochow University, Suzhou , China |
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| Abstract: |
| Objective To study the resistance to plastic deformation of iron-nickel gradient materials under the low and repeated impact stress. Methods Repeated impact tests were conducted on pure iron material, iron-nickel mutation material and iron-nickel gradient material. The cumulative deformation, strain and deformation hardening degree with different depths, and the surface microstructure were analyzed and compared. Results The total deformation, strain and deformation hardening degree with different depths of the pure iron material were a little larger than those of the iron-nickel mutation material, and much larger than those of the iron-nickel gradient material. The surface of the pure iron material and the iron-nickel mutation material was single-phase polycrystalline structure and the density of interface was small. The surface of the iron-nickel gradient material was multiphase polycrystalline structure, the density of interface was larger, and the plastic deformation was more suppressed. Conclusion For the resistance ability to plastic deformation under the low and repeated impact stress, the iron-nickel gradient material was the strongest, followed by the iron-nickel mutation material, and the pure iron material specimen was the worst. |
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