General Electric Company

Gail E Dunning

John Frederick Ackerman

Thomas Pompilio Diaz

James Edgar Burner

Catherine Procik Dulka

Richard Oran Kilgo

Edwin R Baker

Ronald E LeBlanc

Method of treating a surface of a steam line plug grip wherein the surface is subjected to chemical vapor deposition (CVD) treatment to introduce a hard oxide material into pores and cracks in the surface.

CVD treatment of hard friction coated steam line plug grips

A double-cantilever beam crack growth sensor made from welded alloy, e.g., nickel-based alloy, and a method for fabricating such sensors. The method includes the steps of forming a strongback from a block of a first nickel-based alloy; depositing a suitable thickness of nickel-based weld alloy on top of the strongback to form a bi-metallic test block; welding a second block of the first nickel-based alloy on top of the weld alloy; and machining the final three-layer block to form a double-cantilever beam crack growth sensor consisting of cantilever beams made of the first nickel-based alloy, a crack growth section of weld alloy having a microstructure wherein the direction of dendritic growth is parallel to the direction of crack growth and a third section made of the first nickel-based alloy.

Welded nickel alloy double-cantilever beam crack growth sensor and

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Sunnyvale, CA, United States of America

Gail E Dunning