Douglas J Hornbach from 8567 Leatherwood Rd, Dover, IN 47022, age 54, Phone: (812)6230186

Metallic Article With Integral End Band Under Compression
view source
US Patent:

20060280612, Dec 14, 2006
Filed:

Jun 9, 2005
Appl. No.:

11/148964
Inventors:

Paul Prevey - Cincinnati OH, US
Douglas Hornbach - Guilford IN, US
International Classification:

B64C 27/46
US Classification:

41622300R
Abstract:

An article made of a metallic material and comprising a body and a body end portion integral with the body, includes a band of the metallic material at the end portion substantially through the entire end portion, the band being under a compressive stress greater than the body. An example of the article is a turbine engine blading member in which the body is the airfoil of the member and the band is disposed at the radially outer tip portion of the airfoil. One method for providing the band includes performing roller deformation on the end portion until a desired amount of compressive stress is developed in the band substantially through the entire end portion.

Metallic Components For Use In Corrosive Environments And Method Of Manufacturing
view source
US Patent:

20110223443, Sep 15, 2011
Filed:

Mar 15, 2011
Appl. No.:

13/065157
Inventors:

Jeremy E. Scheel - Cincinnati OH, US
Douglas J. Hornbach - Guilford IN, US
International Classification:

B22D 25/00
B21D 31/00
US Classification:

428687, 723792
Abstract:

The present invention relates to a metallic component and method of manufacture of the component for use in a corrosive environment, such as components used in fossil fuel recovery or used in chemical facilities. The components comprise at least one metallic portion having a deep, stable layer of compressive stress for providing life extension and mitigation of fatigue and corrosion related failures. Preferably, the layer of compressive stress has a depth that exceeds the depth of any surface irregularities.

Method And System For Improving A Part's Resistance To Stress Induced Failure
view source
US Patent:

7219044, May 15, 2007
Filed:

Oct 7, 2004
Appl. No.:

10/960246
Inventors:

Paul S. Prevey - Cincinnati OH, US
Douglas J. Hornbach - Guilford IN, US
Assignee:

Surface Technology Holdings, Ltd. - Cincinnati OH
International Classification:

G06G 7/48
US Classification:

703 7, 73804
Abstract:

A method and system for designing a part with improved fatigue life and resistance to stress corrosion cracking in which residual stresses existing in the part are accounted for. The performance criteria and operating conditions of the part are assessed and a total stress state is determined from the sum of the residual stresses and applied stresses acting on the part. Unified Fatigue Performance Model or Smith-Topper-Neuber parameters are used to determine fatigue life functions which, in turn, are used in conjunction with a fatigue design diagram to determine the appropriate residual stress to introduce in order to optimize the part's resistance to stress induced failure mechanisms. A residual stress distribution is then designed to avoid distortion of the part while still imparting the beneficial effects of compressive residual stress.

Douglas J Hornbach