J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (04): 513-515.
表面机械研磨处理(SMAT)提高管线钢焊接接头疲劳寿命的研究Improved fatigue behavior of pipeline steel welded joint by means of surface mechanical attrition treatment (SMAT)
王宇;黄敏
- 西安石油大学材料科学与工程学院
Improved Fatigue Behavior of Pipeline Steel Welded Joint by Surface Mechanical Attrition Treatment (SMAT)
Yu Wang1,2), Min Huang2), Lei Zhou3), Zhixin Cong2), Huilin Gao 2)†
- 1) School of Materials Science and Engineering, Xi0an University of Architecture and Technology, Xi0an 710055, China
2) School of Materials Science and Engineering, Xi0an Shiyou University, Xi0an 710065, China
3) Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
摘要：
采用表面机械研磨（SMAT）技术对X80管线钢焊接接头进行了处理。结果表明：SMAT处理后X80管线钢焊接接头表层的平均晶粒尺寸约为10nm；X80管线钢焊接接头的疲劳极限提高约13%；在低应力和高应力范围内，疲劳强度和疲劳寿命都得到了提高。与表面残余应力对X80管线钢焊接接头性能的影响相比，由SMAT处理形成的表面纳米化结构表层对X80管线钢焊接接头疲劳性能的提高起更主要的作用。