GB1319897A - Detection of unwanted core material remaining in castings - Google Patents

Detection of unwanted core material remaining in castings

Info

Publication number
GB1319897A
GB1319897A GB3920471A GB1319897DA GB1319897A GB 1319897 A GB1319897 A GB 1319897A GB 3920471 A GB3920471 A GB 3920471A GB 1319897D A GB1319897D A GB 1319897DA GB 1319897 A GB1319897 A GB 1319897A
Authority
GB
United Kingdom
Prior art keywords
powder
core
blade
castings
core material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3920471A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northrop Grumman Space and Mission Systems Corp
Original Assignee
TRW Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TRW Inc filed Critical TRW Inc
Publication of GB1319897A publication Critical patent/GB1319897A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/18—Investigating the presence of flaws defects or foreign matter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

1319897 Testing castings for-core removal TRW Inc 20 Aug 1971 39204/71 Heading G1S Parts such as a turbine blade 10 made by casting metals around cores of say siliceous material which is afterwards dissolved by acid and so on; are checked to see if any core material remains by first filling the core passages 13 with radiographically detectable powder 14 subjected to vibration compaction and then exposing the blade 10 to penetrating radiation 15 such as X or gamma rays. Behind the blade is a radiation sensitive film 16 which shows up residual core materials (17), Fig. 3 (not shown) as indications 18 on the film. Direct fluoroscopic examination or electronic image enhancement may also be employed if desired. When the powder attenuation co-efficient and the degree of packing of the powder in the passages provide radiation characteristics similar to that of the casting itself then the part appears to be solid except where residual core materials show up. Tables and formulae in the specification enable the mass attenuation co-efficients for various metals to be determined and the powder particle size and acceleration for compaction to be found.
GB3920471A 1971-08-20 1971-08-20 Detection of unwanted core material remaining in castings Expired GB1319897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3920471 1971-08-20

Publications (1)

Publication Number Publication Date
GB1319897A true GB1319897A (en) 1973-06-13

Family

ID=10408266

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3920471A Expired GB1319897A (en) 1971-08-20 1971-08-20 Detection of unwanted core material remaining in castings

Country Status (1)

Country Link
GB (1) GB1319897A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6240160B1 (en) 1996-09-19 2001-05-29 Den Norske Stats Oljeselskap A.S. System for inspection of pipelines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6240160B1 (en) 1996-09-19 2001-05-29 Den Norske Stats Oljeselskap A.S. System for inspection of pipelines

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees