A material is known as allotropic or polymorphic if it

Engineering Materials
A material is known as allotropic or polymorphic if it

Has a fixed structure under all conditions

Exists in several crystal forms at different temperatures

Responds to heat treatment

Has its atoms distributed in a random pattern

Has a fixed structure under all conditions

Exists in several crystal forms at different temperatures

Responds to heat treatment

Has its atoms distributed in a random pattern

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Engineering Materials
Grey cast iron

Is produced by annealing process. I is soft, tough and easily machined metal

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Is also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable

Is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material

Is produced by annealing process. I is soft, tough and easily machined metal

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Is also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable

Is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material

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Engineering Materials
In compression, a prism of brittle material will break

By forming a bulge

By shearing along oblique plane

In direction perpendicular to application of load

By crushing into thousands of pieces

By forming a bulge

By shearing along oblique plane

In direction perpendicular to application of load

By crushing into thousands of pieces

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Engineering Materials
Age-hardening is related with

Gun metal

Stainless steel

German silver

Duralumin

Gun metal

Stainless steel

German silver

Duralumin

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Engineering Materials
In the lower part of the blast furnace (zone of fusion), the temperature is

1500°C to 1700°C

400° to 700°C

1200°C to 1300°C

800°C to 1000°C

1500°C to 1700°C

400° to 700°C

1200°C to 1300°C

800°C to 1000°C

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Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.

Chromium

Nickel

Copper

Magnesium

Chromium

Nickel

Copper

Magnesium

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Engineering Materials

Engineering Materials A material is known as allotropic or polymorphic if it

Engineering Materials Grey cast iron

Engineering Materials In compression, a prism of brittle material will break

Engineering Materials Age-hardening is related with

Engineering Materials In the lower part of the blast furnace (zone of fusion), the temperature is

Engineering Materials Nodular cast iron is produced by adding ________ to the molten cast iron.

Engineering Materials
A material is known as allotropic or polymorphic if it

Engineering Materials
Grey cast iron

Engineering Materials
In compression, a prism of brittle material will break

Engineering Materials
Age-hardening is related with

Engineering Materials
In the lower part of the blast furnace (zone of fusion), the temperature is

Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.