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Materials And Processing For NDT > 12 Millwork, Forging, and Powder Metallurgy > Flashcards

12 Millwork, Forging, and Powder Metallurgy Flashcards

1
Q

It is often economical to apply NDT to products intended for secondary operations in order to assure

A

That prior processing defects are not carried forward into secondary processing

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2
Q

Cast ingots that are approximately square cross-sections of large and small size

A

Blooms and billets

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3
Q

Cast ingots that are rectangular in shape

A

Slabs

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4
Q

Oxygen torch burning to remove near surface defects caused by ingot or rolling faults is called

A

Scarfing

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5
Q

Cleaning material in acid baths to attack the scale is known as

A

Pickling

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6
Q

Process for making steel pipe consists of drawing heated bevel edge skelp through

A

Welding bell

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7
Q

Method used for manufacturing of seamless tube

A

Piercing

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8
Q

Tubing operation where a heated cylinder disc is forced through a die by a punch to form a closed bottom cylinder

A

Cupping

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9
Q

Method used to inspect seamless tubing that can have tears and other crack like defects and irregularities in sizing and wall thickness

A

Eddy current ET

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10
Q

Methods used to inspect welds in pipe

A

radiography RT and ultrasonic UT

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11
Q

The extrusion process is used primarily for forming shapes of

A

Aluminum, copper, lead alloys, and plastic

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12
Q

Method most commonly applied to testing tubular products that are intended for high-pressure applications or high-strength structural applications

A

Eddy current ET

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13
Q

Operation that exhibits three dimensional control of the shape

A

Forging

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14
Q

Two types of forging are

A

Open and closed dies

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15
Q

Forging process used for closing or necking of cylinders and for overall reduction of tubular products

A

Rotary swaging

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16
Q

Forging dies are constructed so that in the closed position a space is left at the parting line through which the excess metal is forced into this

A

Gutter

17
Q

Excess metal that is part of the forging that must be removed in a secondary operation

A

Flash

18
Q

NDT method that is useful to reveal internal voids, cracks and inclusions in powdered metal parts

A

Radiography RT

19
Q

Mechanism by which solid particles are bonded by application of pressure or heat, or both

A

Sintering

20
Q

The application of heat and pressure together, are called

A

Hot pressing

21
Q

The application of heat after the particle have been closely packed is known as

A

Cold pressing

22
Q

Improves the density, strength, and ductility of powder metallurgical products

A

Repressing or coining

23
Q

Inorganic materials, such as oil’s or waxes, maybe infuse into porous metal products for the purpose of lubrication by

A

Impregnation

24
Q

Product produced by impregnating high melting temperature metals with low melting temperature metals

A

Cemented steels

25
Q

Method used to determine the adequacy of impregnation of metals

A

Film radiography and fluoroscopy

26
Q

Cold rolling sheet steel usually begins with the material that

A

Has been previously hot rolled to dimensions close to the size of the finished product

27
Q

A process that requires the use of large powerful equipment that forms ductile material into a wide variety of long length uniform cross-sectional shapes best describes

A

Extrusions

28
Q

Product form that is generally selected for high-strength and controlled property directionality

A

Forging

29
Q

Powdered metallurgy provides two unique advantages in the metal processing. One is the capability to produce shapes and objects of refactory metals that are extremely difficult or impractical to melt; the other is to

A

Produce metal sheets with controlled porosity

30
Q

A major purpose of pressing the metal powders during powder metallurgy processing is to

A

Compact the powders into mechanical and atomic closeness

31
Q

In the powder metallurgy process, sintering is

A

In most cases, a fully solid-state process

32
Q

Powdered metallurgy products cannot

A

Attain 100% of theoretical density

33
Q

Defect normally found in extruded pipe is

A

Seam

34
Q

Cracks, seams, laps, and laminations are all dicontunuities of

A

Forgings

Materials And Processing For NDT (17 decks)

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