Ciencias de Materiales

Question 1

Para aumentar la deformacion en los metales se puede

Answer 1

• Anadir alloying elements
• Hardening

Question 2

Para aumentar la ductibilidad en un metal se puede

Answer 2

tempering
hot working

Question 3

___ es un iron-carbon, se descompone de auestenite at 723 , tiene una mezcla de dos componentes solidos y el ferrite y cementite forman parte de el

Answer 3

Pearlite

Question 4

___ formed by quenching austenite, high hardeness, low ductility

Answer 4

Martensite

Question 5

Gibss Phase Rule Formula

Answer 5

P + F = C +2
P - numero de phases
F - degrees of freedom
C - # of components

Question 6

____ tienen una estructura estable (BCC); no pueden ser hardened significativamente, less expensive and heat resisting

Answer 6

Ferric stainless steels

Question 7

___ se utilizan para corrosive applications porque tienen corrosive resistance

Answer 7

Austenitic stainless steel

Question 8

____ son heat treatable, stainless steel, corrosion resistan, hardness, cut and surgical instruments

Answer 8

Martensitic Stainless Steel

Question 9

___ pure iron in BCC, magnetic, low hardness, high tensil strenght, high ductility

Answer 9

Ferrite

Question 10

___ carbide, Iron carbide, Hardest of all form of iron, Low tensil Strenght, brittle

Answer 10

Cementite

Question 11

Ductile to Brittle Transition Temperature - Se utiliza el ___ test para halalr la energia requerida

Answer 11

Charpy

Question 12

(T/F) Ductile to Brittle Transition Temperature - La transicion comienza en la fracture transition plastic temperature la cual es tomada como la temperatura a la cual el impacto de 20 J va a causar falla.

Answer 12

True

Question 13

Endurance limit es equivalente a

Answer 13

Fatigue Limit

Question 14

____ Testing
- Resist Deformation
Y tiene los siguientes tests:
- Brinell
- Scratch Test
- Rockwell

Answer 14

Hardeness Testing

Question 15

___ Test - Creep strenhth continous yielding

Answer 15

Creep test

Question 16

____ Test
Fatigue Bending

Answer 16

Endurance Test or Rotating beam test

Question 17

___ Test
Thoughness

Answer 17

Impact Test

Question 18

Cold working metsl decrease the recrystallization temp, ductiliry and slipping or twinging takes place. The grains become elongated instead of equiaxed. (T/f)

Answer 18

T