+Advanced Search
Experiment study on improving fatigue strength of K24 nickel based alloy by laser shock processing without coating
Author:
Affiliation:

Science and Technology on plasma dynamics laboratory,Air Force Engineering University,Xi’an,Science and Technology on plasma dynamics laboratory,Air Force Engineering University,Xi’an,Science and Technology on plasma dynamics laboratory,Air Force Engineering University,Xi’an,Science and Technology on plasma dynamics laboratory,Air Force Engineering University,Xi’an,Science and Technology on plasma dynamics laboratory,Air Force Engineering University,Xi’an,Science and Technology on plasma dynamics laboratory,Air Force Engineering University,Xi’an

  • Article
  • | |
  • Metrics
  • |
  • Reference [18]
  • |
  • Related
  • |
  • Cited by
  • | |
  • Comments
    Abstract:

    Laser shock processing without coating (LSPwC) is a novel surface treatment, which can effectively increase the fatigue strength of metal materials by introducing compressive residual stress and microstructural changes. The objective of this work is to improve the fatigue resistance of K24 nickel based alloy by LSPwC. Firstly, high cycle vibration fatigue experiment was adopted to verify the LSPwC strengthening effect. Compared to the untreated samples, the results of the vibration fatigue experiments showed that the fatigue strength of K24 alloy was enhanced and improved from 282MPa to 328MPa after LSPwC. Secondly, the effects of multiple impacts on mechanical properties and fatigue fracture morphologies were investigated, which were observed and measured by scan electron microscope (SEM), X-ray diffractometer and microhardness tester. The results indicated that residual stress presented compressive state on the superficial layer with about 150μm depth and the maximum value reaches -595MPa. The microhardness is about 526 HV0.5 with about 100 μm depth from the top surface after three impacts. The fracture observation indicated that the flatness area was larger in the FCI after LSPwC, meanwhile, the growth rate of fatigue crack was decreased. Lastly, the strengthening mechanism of LSPwC on the fatigue resistance was discussed based on the experimental results.

    Reference
    1 Wang Zhongguang. Fatigue of Structures and Materials[M]. Beijing: National Defence Industry Press, 1999: 10 (in Chinese)
    2 Hatamleh O, Lyons J, Forman R. International Journal of Fatigue[J], 2007, 29(3): 421
    3 Luong H, Hill M R. Materials Science and Engineering A[J], 2010, 527(3): 699
    4 Montross C S, Wei T, Ye L et al. International Journal of Fatigue[J], 2002, 24(10): 1021
    5 Nie Xiangfan, He Weifeng, Zhou Liucheng et al. Materials Science and Engineering A[J], 2014, 594: 161
    6 Li Yinghong, Zhou Liucheng, He Weifeng et al. Science and Technology of Advanced Materials[J], 2013, 14(5): 055 010
    7 Zhou Z, Gill A S, Qian D et al. International Journal of Impact Engineering[J], 2011, 38(7): 590
    8 Sano Y, Obata M, Kubo T et al. Materials Science and Engineering A[J], 2006, 417(1-2): 334
    9 Sano Y, Masaki K, Gushi T et al. Materials and Design[J], 2012, 36: 809
    10 Maawad E, Sano Y, Wagner L et al. Materials Science and Engineering A[J], 2012, 536: 82
    11 Trdan U, Porro J A, Oca?a J L et al. Surface & Coatings Technology[J], 2012, 208: 109
    12 Sathyajith S, Kalainathan S, Swaroop S. Optics & Laser Technology[J], 2013, 45: 389
    13 “China Aeronautical Materials Handbook” Edits Committee. The Second of China Aeronautical Materials Handbook[M]. Beijing: China Standards Press, 2001: 645 (in Chinese)
    14 Fabbro R, Fournier J, Ballard P et al. Journal of Apply Physics[J], 1990, 68(2): 775
    15 Peyre P, Fabbro R, Merrien P et al. Materials Science and Engineering A[J], 1996, 210(1-2): 102
    16 Nie X, Li Y, He W et al. Recent Advances in Structural Integrity Analysis: Proceedings of the International Congress (APCF/SIF-2014)[C]. Australia: Amsterdam Woodhead Publishing, 2014: 2
    17 Zhou J Z, Huang S, Sheng J et al. Materials Science and Engineering A[J], 2012, 539: 360
    18 Ei Haddad M H, Topper K J, Pook L P. Metal Fatigue[M]. London: Oxford University Press, 1974: 135
    Related
    Cited by
Get Citation

[Luo Sihai, Nie Xiangfan, Wang Xuede, Wang Bo, Li Jing, He Weifeng. Experiment study on improving fatigue strength of K24 nickel based alloy by laser shock processing without coating[J]. Rare Metal Materials and Engineering,2017,46(12):3682~3687.]
DOI:[doi]

Copy
Article Metrics
  • Abstract:1179
  • PDF: 1179
  • HTML: 136
  • Cited by: 0
History
  • Received:December 26,2015
  • Revised:April 22,2016
  • Adopted:May 18,2016
  • Online: January 04,2018