采用高能喷丸技术对SS400钢表面进行纳米化处理,利用透射电子显微镜分析了表面纳米晶层的结构特征,同时对高能喷丸表面纳米化处理后残余应力沿厚度方向的变化进行了分析.结果表明:经过超声冲击处理后,试样表层的晶粒可细化至纳米尺度,且在表面形成厚度约为600 μm的压应力层,压应力沿试样深度方向逐渐减小直至过渡到拉应力.在98±3℃温度下,Ca(NO3)2 57%+NH4NO3 3%溶液中进行的慢应变速率拉伸试验,结果表明,高能喷丸表面纳米化可以提高SS400钢的抗应力腐蚀开裂(SCC)性能.
参考文献
| [1] | Lu K;Lu J;Tao NR;Sui ML .Surface nanocrystallization of iron induced by ultrasonic shot peening[J].Nanostructured Materials,1999(4):433-440. |
| [2] | H.Q. Sun;Y.-N. Shi;M.-X. Zhang .Plastic strain-induced grain refinement in the nanometer scale in a Mg alloy[J].Acta materialia,2007(3):975-982. |
| [3] | K. Wang;N.R. Tao;G. Liu .Plastic strain-Induced grain refinement at the nanometer scale in copper[J].Acta materialia,2006(19):5281-5291. |
| [4] | 李东,陈怀宁,刘刚,卢柯.SS400钢焊接接头表层组织纳米均一化及硬度均一化处理[J].金属学报,2001(09):980-984. |
| [5] | 李东,陈怀宁,刘刚,卢柯,林泉洪.SS400钢对接接头表面纳米化及其对疲劳强度的影响[J].焊接学报,2002(02):18-21. |
| [6] | Y. S. Zhang;Z. Han;K. Wang;K. Lu_ .Friction and wear behaviors of nanocrystalline surface layer of pure copper[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2006(9/10):942-948. |
| [7] | W. P. Tong;N. R. Tao;Z. B. Wang;H. W. Zhang;J. Lu;K. Lu .The formation of ε-Fe_(3-2)N phase in a nanocrystalline Fe[J].Scripta materialia,2004(5):647-650. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%