Comparison Research on Mechanical Properties of High Temperature Alloy after Laser Peened and Ultrasonically Peened

Abstract:

For comparative study of the influence of laser shock peening and ultrasonic shot peening on the mechanical property of superalloy K403, untreated, ultrasonic shot peening with 850°C heat preservation, laser shock (heat preservation, Hp), the fatigue testing of samples under four states were conducted at room temperature, and the analysis of two techniques’ influence on the mechanical properties of K403 was done by hardness tester, profile tester, scanning electron microscopy (SEM). The results indicated that LSP with Hp, LSP, USP with Hp can improve the fatigue life of K403 respectively for 2.4, 2.25, 1.4 times more longer than untreated sample; the increase of micro-hardness gradient after LSP were smaller than after USP. The SEM studies showed that the γ' phase distortion was elongated and the plastic deformation of samples by LSP was larger than by USP.

• Periodical: Applied Mechanics and Materials (Volumes 670-671)
• Pages: 46-51
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.670-671.46
• Online since: October 2014
• Authors: Xiao Jun Shen*, Cheng Wang, Dong Sun, Zhi Lin Lai, Dong Ye Yao
• Keywords: K403, Laser Shot Peening, Mechanical Property, Ultrasonic Shot Peening

References

[1] Li Yinghong. He Weifeng. Li Wei et al., Research on enhancement of aero-engine components fatigue reliability by laser shock processing[C]. The Fifth Aero-Engine Reliability Academic Communication Proceddings, 2009. 564~571.

[2] Lai Zhilin. Wang Cheng. Li Yinghong et al., Effects of Laser Shock Peening and Ultrasonic Shot Peening on Fatigue Property of 1Cr11Ni2W2MoV Stainless Steel[J]. Laser&Optoelectronics Progress, 2013. 5, 051403.

DOI: 10.3788/lop50.051403

[3] Yan Linlin. The Technology and Application of Ultrasonic Shot Peening[J]. Manufacturing Technology&Machine Tool, 2010. 6, 29-31.

[4] Yang J M， Her Y C，Clauer A H. Laser shock peening on fatigue behavior of 2024-T6 Al alloy with fastener holes and stop holes [J]. Material Science Engineer， 2001， A298: 296-299.

DOI: 10.1016/s0921-5093(00)01277-6

[5] Michael R H， Adrian T D，Anne G D et al. Laser peening technology. Advanced Materials & Processes, 2003, 161(8), 65-71.

[6] Universal Technology Corporation. High Cycle Fatigue(HCF) Science and Technology Program 2002 Annual Report[R]. (2003).

[7] Richard D T， David F L. Preventing fatigue failures with laser peening[J]. The AMPTIAC Quarterly, 2003, 7(2), 3-7.

[8] Ma Zhuang, Basic Research for Application of Laser Shock Processing on Aero-Engine Components[D], Xi`an; Air Force Engineering University, (2008).

[9] R Fabbro, P Peyre, L Berthe, et al. Physics and applications of laser-shock processing[J]. Journal of Laser Applications, 1998, 10: 265~279.

DOI: 10.2351/1.521861