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A novel seeding methodology for dete...

Ret, Paul Louis.

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A novel seeding methodology for determining the detectability and effects of inclusions in titanium castings.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A novel seeding methodology for determining the detectability and effects of inclusions in titanium castings./
Author:	Ret, Paul Louis.
Description:	323 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-01, Section: B, page: 0398.
Contained By:	Dissertation Abstracts International65-01B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3119491

A novel seeding methodology for determining the detectability and effects of inclusions in titanium castings.
Ret, Paul Louis.

A novel seeding methodology for determining the detectability and effects of inclusions in titanium castings. - 323 p.

Source: Dissertation Abstracts International, Volume: 65-01, Section: B, page: 0398.

Thesis (Ph.D.)--The Ohio State University, 2004.

A novel artificial inclusion seeding methodology was developed to simulate actual titanium investment casting inclusions. Inclusions were added to machined holes in cast titanium plate (Ti-6Al-4V). After being welded closed in a vacuum, hot isostatic pressing (HIP) was utilized to incorporate the inclusions into the cast material.Subjects--Topical Terms:

1017759
Engineering, Materials Science.

A novel seeding methodology for determining the detectability and effects of inclusions in titanium castings.
LDR:03430nmm 2200313 4500 001 1865389
005 20041217071852.5
008 130614s2004 eng d
035 $a (UnM)AAI3119491
035 $a AAI3119491
040 $a UnM $c UnM
100 1 $a Ret, Paul Louis. $3 1952838
245 1 2 $a A novel seeding methodology for determining the detectability and effects of inclusions in titanium castings.
300 $a 323 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-01, Section: B, page: 0398.
500 $a Adviser: Jerald R. Brevick.
502 $a Thesis (Ph.D.)--The Ohio State University, 2004.
520 $a A novel artificial inclusion seeding methodology was developed to simulate actual titanium investment casting inclusions. Inclusions were added to machined holes in cast titanium plate (Ti-6Al-4V). After being welded closed in a vacuum, hot isostatic pressing (HIP) was utilized to incorporate the inclusions into the cast material.
520 $a To validate that this methodology did not result in inherent mechanical property degradation, machined, backfilled, and HIPed holes were produced and compared to virgin, cast Ti-6Al-4V material. Fatigue test results indicated that the drill and HIP methodology did not result in any fundamental mechanical property degradation that would bias comparative results.
520 $a Validation that the artificially seeded inclusions were equivalent to "as cast" inclusions was completed. The nondestructive inspection response (to multiple techniques), mechanical fatigue behavior, and metallographic characteristics of the inclusions artificially seeded by the developed methodology were determined to be indecipherable from "as cast" inclusions.
520 $a The industry need for supporting data in terms of nondestructive inspection, metallography, and fatigue life was also addressed by this work. The data generated to evaluate the novel seeding methodology was examined with respect to Ti-6Al-4V casting design and inspection needs. The industry methodology for developing radiographic probability of detection data for both ceramic and hard alpha inclusions was determined to be unconservative. The absence of a reaction zone surrounding inclusions placed on varying thicknesses of material prior to radiographic inspection resulted in an overestimation of what is detectable during manufacturing inspections. Metallographic and mechanical data indicate that of the fatigue life effects of the diffusion zone surrounding hard alpha inclusions are minor compared to the effects of the inclusions themselves. Modeling hard alpha inclusions as sharp penny cracks accounting for a "fixed" diffusion related halo appears appropriate. Nondestructive inspection results indicated that immersion ultrasonics is superior at detecting hard alpha inclusions to X-ray radiography. Limited phased array ultrasonic evaluation identified this technique to present an even better detection potential. However, the inspection method should always be determined based upon the geometry of the component to be inspected and the inclusion size that is required to be found.
590 $a School code: 0168.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Engineering, Metallurgy. $3 1023648
650 4 $a Engineering, Industrial. $3 626639
690 $a 0794
690 $a 0743
690 $a 0546
710 2 0 $a The Ohio State University. $3 718944
773 0 $t Dissertation Abstracts International $g 65-01B.
790 1 0 $a Brevick, Jerald R., $e advisor
790 $a 0168
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3119491