Patent ID: 7543378

Claim:
A method for manufacturing a test bar from a gas-turbine-engine casing, wherein the method comprises the steps of: a) obtaining a casing section from the gas-turbine-engine-casing, wherein the casing section includes a casing portion, and wherein the casing portion has a substantially rectangular cross section and has a width; b) obtaining first and second semi-circular cylinders having a diameter substantially equal to the width of the casing portion; c) disposing the casing section between, and in contact with, the first and second semi-circular cylinders defining a casing-section-cylinder assembly having first and second assembly ends; d) obtaining first and second extensions; e) inertia welding the first end extension to the first assembly end and the second end extension to the second assembly end defining a test-bar stock; and f) machining the test-bar stock creating the test bar, wherein the test bar has a gage section from the casing portion of the test-bar stock, wherein the gage section has a cross section substantially identical to the substantially rectangular cross section of the casing portion of the test-bar stock, and wherein the test bar has ends having a diameter greater than the width of the casing portion of the test-bar stock.