International Journal of Fatigue 110 (2018) 186–196 Contents lists available at ScienceDirect International Journal of Fatigue journal homepage: www.elsevier.com/locate/ijfatigue Eﬀect of ultrasonic nanocrystal surface modiﬁcation on elevated temperature residual stress, microstructure, and fatigue behavior of ATI 718Plus alloy a, a b a Micheal Kattoura , Seetha Ramaiah Mannava , Dong Qian , Vijay K. Vasudevan Department of Mechanical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0072, USA Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX 75080-3021, USA ARTICLE I NFO ABSTRACT Keywords: Ultrasonic Nanocrystal Surface Modiﬁcation (UNSM) is a mechanical surface treatment that induces large Ultrasonic Nanocrystal Surface Modiﬁcation compressive residual stresses and near-surface microstructural changes in the material by using repetitive (UNSM) impacts at ultrasonic frequencies with a WC tip. In this study, we investigate the use of UNSM to improve Nickel-based superalloys the fatigue life of ATI 718 Plus (718Plus) at high temperature of 650 °C. UNSM induced severe surface High temperature fatigue plastic deformation which led to nano-sized crystallites, twins, and high dislocation density in the near Residual stresses surface regions, coupled with an increase in surface hardness and high magnitude of compressive residual Electron microscopy stresses. This change in the near-surface
International Journal of Fatigue – Elsevier
Published: May 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera