Gas Turbine Engine ProjectGas Turbine Engine ProjectMaterials Joint Test ProtocolMaterials Joint Test Protocol

Document Principally Prepared ByDocument Principally Prepared By

Jerry SchellJerry Schell

GE Aircraft EnginesGE Aircraft Engines

Additional Input From GTE OEMsAdditional Input From GTE OEMs

and DoD Repair Depotsand DoD Repair Depots

Component AlloysComponent AlloysSeven alloys selected for technical evaluationSeven alloys selected for technical evaluationIN718, INC901, AM355, A286, 17-4PH, 4340, 9310IN718, INC901, AM355, A286, 17-4PH, 4340, 9310

Nominal Compositions in Weight % of Parent Metal Alloys Selected For Materials Joint Test ProtocolAlloy AMS

SpecNi(+Co)

Cr Fe Mo Nb+Ta Ti Al C Mn Cu Si B,other

IN718 5663 50-55 19.0 19.0 3.0 5.1 0.9 0.50 0.08 0.35max

0.75max

0.45max

0.006max

IN901 56605661

41-44 13.5 35.0 6.0 ---- 2.7 0.25 0.05 ---- ---- ---- 0.01

AM355 5743 4.5 15.5 75.5 2.9 ---- ---- ----- 0.13 0.85 ---- 0.5 0.1 NitA286 5731 26.0 15.0 52.7 1.3 ---- 2.1 0.3 0.04 1.5 ---- 0.7 0.005,

0.3 V17-4PH 5355 4.1 16.0 76.4 ---- 0.28 ---- ---- ---- ----- 3.2 ---- ----4340 6415 1.75 0.8 95.8 0.25 ---- ---- ---- 0.40 0.70 ---- 0.3 ----9310 6260

62653.25 1.2 94.1 0.12 ---- ---- ---- 0.10 0.55 0.35

max0.3 ----

Coating Compositions to beCoating Compositions to beInvestigated in ProjectInvestigated in Project

HVOF ProcessHVOF Process Air Plasma Spray ProcessAir Plasma Spray Process

WC/17CoWC/17Co WC/17CoWC/17Co

CrCr33CC22/(20)NiCr/(20)NiCr Co/28Mo/8Cr/2Si*Co/28Mo/8Cr/2Si*

Co/28Mo/8Cr/2Si*Co/28Mo/8Cr/2Si*

Co/28Mo/17Cr/3Si**Co/28Mo/17Cr/3Si**

* Tribaloy 400* Tribaloy 400

** Tribaloy 800** Tribaloy 800

Materials JTP StructureMaterials JTP Structure

FIVE MAJOR TASKS:FIVE MAJOR TASKS:1. Spray process optimizations1. Spray process optimizations

2. Fatigue2. Fatigue

3. Wear and friction3. Wear and friction

Fretting tests, carbon seal testsFretting tests, carbon seal tests

4. Corrosion tests4. Corrosion tests

5. Producibility tests5. Producibility tests

- Stripability- Stripability - Grindability- Grindability

- Assembly/Disassembly- Assembly/Disassembly

(This item could potentially be removed from JTP(This item could potentially be removed from JTP

Current Status of Materials JTPCurrent Status of Materials JTP

Jerry Schell completed coatings optimization Jerry Schell completed coatings optimization work on HVOF Tribaloy 400 and Tribaloy 800 at work on HVOF Tribaloy 400 and Tribaloy 800 at Hitemco in October 2001Hitemco in October 2001

Hitemco has initiated deposition of T400, T800 Hitemco has initiated deposition of T400, T800 and WC/Co (optimized in landing gear project) and WC/Co (optimized in landing gear project) onto 350 fatigue couponsonto 350 fatigue coupons

Southwest United Industries to initiate Southwest United Industries to initiate deposition of hard chrome onto 162 fatigue deposition of hard chrome onto 162 fatigue coupons in early Marchcoupons in early March

Remaining fatigue coupons have been Remaining fatigue coupons have been fabricated; deposition awaiting optimization fabricated; deposition awaiting optimization studiesstudies

IssuesIssues

Navy provided additional comments to MJTP in August 2001Navy provided additional comments to MJTP in August 2001 Jerry Schell assigned to special Navy project to implement Jerry Schell assigned to special Navy project to implement

PVD coatings onto turbine blades in T64 engine in November; PVD coatings onto turbine blades in T64 engine in November; expected to run through March 2002expected to run through March 2002

Current ActionsCurrent Actions Discussion held with Jerry Schell to address issues raised by Discussion held with Jerry Schell to address issues raised by

Navy; another draft of MJTP to be prepared by late FebruaryNavy; another draft of MJTP to be prepared by late February Meeting to resolve all outstanding issues and finalize MJTP Meeting to resolve all outstanding issues and finalize MJTP

was held on 19 February before HCAT Meetingwas held on 19 February before HCAT Meeting No-cost extension to contract with GEAE issued by Geo-No-cost extension to contract with GEAE issued by Geo-

CentersCenters

Should have extensive materials test results by time Should have extensive materials test results by time of August/September HCAT meetingof August/September HCAT meeting