Method of estimating tensile properties of IN718 cast hiped components

• US 6,539,810 B2
• Filed: 12/22/2000
• Issued: 04/01/2003
• Est. Priority Date: 12/22/2000
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Yang, Ling
• Primary Examiner(s): Williams, Hezron
• Assistant Examiner(s): Harrison, Monica D.
• Application Number:
  US09/742,444
• Publication Number:
  US 20020117008A1
• Time in Patent Office: 830 Days
• Field of Search: 737/81--07, 737/60, 738/26, 148/128, 148/421, 148/677
• US Class Current: 73/826
• CPC Class Codes: G01N 15/02 Investigating particle size or size distribution by measuring osmotic pressure G01N7/10; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10
• CPC Class Codes: G01N 2203/0017 Tensile
• CPC Class Codes: G01N 2203/0218 Calculations based on experimental data
• CPC Class Codes: G01N 2203/0226 High temperature; Heating means
• CPC Class Codes: G01N 2203/0246 Special simulation of "in situ" conditions, scale models or dummies
• CPC Class Codes: G01N 2203/0282 Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
• CPC Class Codes: G01N 3/08 by applying steady tensile or compressive forces G01N3/28 takes precedence
• CPC Class Codes: G01N 3/28 Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning

Abstract

A method to estimate the tensile properties of HIPed cast IN718 components at various grain sizes and different operating temperatures by using transfer functions to estimate ultimate tensile strength, yield strength, and elongation.

Claims

1. A method of estimating ultimate tensile strength (UTS) of a HIPed IN718 cast component at an operating temperature comprising solving the following equation using a known average grain size of the component:

2. The method of claim 1 wherein the cast component is a manifold.

3. A method of estimating 0.2% yield strength (0.2% YS) of a HIPed IN718 cast component at an operating temperature comprising solving the following equation using a known average grain size of the component:

4. The method of claim 3 wherein the cast component is a manifold.

5. A method of determining the 0.02% yield strength (0.02% YS) of a HIPed IN718 cast component at an operating temperature comprising solving the following equation using a known average grain size of the component:

6. The method of claim 5 wherein the cast component is a manifold.

7. A method of determining the elongation (elong.) of a HIPed IN718 cast component at an operating temperature comprising solving the following equation using a known average grain size of the component:

8. The method of claim 7 wherein the cast component is a manifold.

9. A method of estimating grain size for a HIPed IN718 cast component with a desired ultimate tensile strength (UTS) or 0.2% yield strength at an operating temperature comprising solving one of the following equations for GS: