Cavitation Peening of Aerospace Bearings, Phase II

Metadata Updated: February 28, 2019

High-value bearings are a critical part of the safety, reliability, cost and performance of modern aircraft. A typical passenger jet will have 100 to 175 high-valve bearings costing from $2,500 to $50,000 each for a total aircraft cost of $300,000 to $600,000. All gas turbine engine bearings are inspected at overhaul and typically 30-40% of there are rejected. For each engine overhaul, bearing replacement costs on average $100,000. Any process that increases bearing performance and reliability will have a commensurate effect on aircraft safety, reliability, performance and operating cost. In Phase I, Ormond demonstrated a novel surface enhancement process, cavitation peening, imparting deep, high magnitude residual stresses that are predicted to significantly enhance bearing life, reliability and performance. Preliminary fatigue results generated in Phase I look promising and analytical results indicate a fatigue life improvement of over 100% may be possible. Cavitation peening uses ultra-high pressure water jets to generate intense clouds of cavitation bubbles that collapse on the work piece generating shock waves that cold work the material. No particles are use, the process produces no waste and adds no weight to the part and is very inexpensive. The new technology is currently being evaluated by Boeing, Sikorsky, Bell and Rolls-Royce for aerospace applications and is proving particularly effective for gears. The company is also working with major bearing manufacturers Timken and SKF to investigate the value of the technology for bearing applications. The proposed Phase II work would refine the process, address readiness level issues and generate the fatigue data that is critical to wide spread acceptance of the cavitation peening technology.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

Downloads & Resources


Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_33688
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id d9d1a01b-48cf-4eb1-9d04-51a421913f21
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2018-02-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 5ea69edc918a4700488182799d20576dd2cd428e
Source Schema Version 1.1

Didn't find what you're looking for? Suggest a dataset here.