Notch treatment methods for flaw simulation

Patent metadata

Field	Value
Publication number	US-11428614-B2
Application number	US-202016912934-A
Country	US
Kind code	B2
Filing date	Jun 26, 2020
Priority date	Mar 24, 2015
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer; isolating the notch; and selectively etching the notch to provide an etched surface of the notch; wherein at least a portion of the re-melt material layer has been removed from the notch. In one aspect, there is provided a notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer, the specimen includes steel or an alloy thereof; isolating the notch; and selectively etching the notch with a first etching solution and a second etching solution to provide an etched surface on the notch; wherein at least a portion of the re-melt material layer has been removed from the notch.

First claim

The invention claimed is:

1. A notch treatment method for flaw simulation, comprising:
providing a specimen with a notch, the notch having a re-melt material layer, the specimen comprises titanium or an alloy thereof;
isolating the notch comprises placing an isolation layer with a slot onto the specimen such that the slot exposes the notch and placing a dam on the isolation layer to form a notch area and a peripheral area on the specimen, wherein the step of placing the dam on the isolation layer comprises forming a moldable cylinder; and
selectively etching the notch by filling the dam with an etching solution comprising Kroll's etchant solution to provide an etched surface of the notch;
wherein at least a portion of the re-melt material layer has been removed from the notch; and
wherein at least a portion of the etched surface on the notch includes microcracks.

2. The treatment method according to claim 1 , wherein the step of providing the specimen with the notch comprises:
generating the notch on the specimen by electrical discharge machining.

3. The treatment method according to claim 1 , wherein the re-melt material layer is disposed on at least one of a root notch and a lateral side wall of the notch.

Assignees

• Bell Textron Inc
• Textron Innovations Inc

Inventors

• Li Xiaoming
• Krasnowski Bogdan R
• Figueroa Robert A
• Wardlaw Robert

Classifications

• G06F2119/18

  Manufacturability analysis or optimisation for manufacturability · CPC title

• G01N2203/0062

  Crack or flaws · CPC title

• G01N3/32

  by applying repeated or pulsating forces · CPC title

• G01N3/62 Primary

  Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups · CPC title

• G06F30/15

  Vehicle, aircraft or watercraft design · CPC title