NDT of Fracture Toughness for Pipeline Steels

Award Information
Agency: Department of Transportation
Branch: N/A
Contract: 6913G618P800122
Agency Tracking Number: 180PH1004
Amount: $149,908.80
Phase: Phase I
Program: SBIR
Solicitation Topic Code: 180PH1
Solicitation Number: 6913G618QSBIR1
Timeline
Solicitation Year: 2018
Award Year: 2018
Award Start Date (Proposal Award Date): 2018-09-10
Award End Date (Contract End Date): 2019-03-09
Small Business Information
450 Rolling Ridge Dr., Bellefonte, PA, 16823-8137
DUNS: 168596554
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Cody Borigo
 Senior Research & Development Engineer
 (814) 234-3437
 cborgio@gwultrasonics.com
Business Contact
 Steven Owens
Title: VP/Director of Engineering
Phone: (814) 234-3437
Email: sowens@gwultrasonics.com
Research Institution
N/A
Abstract
NDT of Fracture Toughness for Pipeline Steels 3/16/2018 Ultrasound-based technology to nondestructively determine fracture toughness of pipeline steels will be developed. Fracture toughness is the material parameter that, along with applied loading and flaw geometry, dictates the critical crack size, and therefore controls the flaw size that must be detected during inspections. A major challenge facing pipeline operators is that many pipelines are old, making their structural integrity uncertain, and that material pedigree of the pipeline steel is unknown. Therefore, operations must be based on minimum values of the material parameters. The probability that actual fracture toughness is higher than the minimum is reasonably high, which means that pipelines are operating below capacity. Nondestructive determination of fracture toughness by ball indentation has not sufficiently solved the problem. Nonlinear features of ultrasonic wave propagation are sensitive to material nonlinearities, associated with microstructure (based on composition and processing), that dictate fracture toughness. Prior results indicate that ultrasonic nonlinearity is related to fracture appearance transition temperature, which in turn is related to fracture toughness. Herein, wave interaction of two circumferential guided waves will be used to generate nonlinear features (in a completely nondestructive way) that will be related to the fracture appearance transition temperature obtained from Charpy V-notch impact tests.

* Information listed above is at the time of submission. *

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