通过X射线衍射线形分析表征了喷丸表面的组织结构, 利用原位拉伸X射线衍射应力分析研究了TiB2/6351Al复合材料喷丸表面基体的力学行为. 结果表明, 喷丸后复合材料表面基体的屈服强度提高了26\%, 整体强度提高约28%, 显微硬度提高50%以上. 喷丸前、后复合材料基体承载系数分别为81%和83%, 喷丸后的基体承载系数略有提高. 喷丸表面基体的晶块尺寸及位错密度分别约51 nm和3.05 X 1014m-2, 晶块细化及位错密度增高是导致表面基体力学性能提高的主要原因.
The microstructures were determined by X-ray diffraction line profile analysis. The influence of shot blasting on the matrix mechanical properties of the surface on TiB2/6351Al was investigated by using in situ tension X-ray diffraction technique. Results show that the proof stress of the matrix in the shot blasted surface had been increased by about 26% and the integral strength had been increased by 28\%. Moreover, the increment of hardness is more than 50%. The bearing stress factor of the matrix of untreated and shot peened surface is 81% and 83%, respectively. The domain size and the dislocation density of the strengthened surface are 51 nm and 3.05 X 1014m-2. The increment of mechanical properties is mainly due to the fine domain and high value of dislocation density introduced by shot blasting.
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| [3] | |
| [4] | |
| [5] | |
| [6] |
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