1material properties

7/24/2019 1Material Properties

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InE191 Engineering Material

1

1.1

1.1.1 (Chemical Properties),

1.1.2 (Physical Properties), , ,

1.1.3 (Mechanical Properties)

, , , ,

(Stress)

3

1. (Tensile Stress)1.1a


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1.1 :

2. (Compressive Stress)

1.1b3.(Shear Stress)t

1.1c (Shear Force) A 3

(Strain and Deformation)

(Strain)(Deformation) () 2

1. (Elastic Deformation or Elastic Strain) ,

2.

(Plastic Deformation or Plastic Strain)

(Elastic Limit) (Elastic Behavior) (Plastic Deformation)2

2


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1.2:

1.(Linear Strain)

2. (Shear Strain)

(Stress-Strain Relationship)

-(Stress-Strain Curve) (Tensile Test) 1.2

-(Brittleness and Ductility) (Formability)

(Tension Test)

1.3

ASTM (American Society ofTesting and Materials), BS (British Standards), JIS (Japanese Industrial Standards) .()


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1.3 : -(Stress-Strain Curve) (Yield Point)

-(A) -(Hook's law)

A (Proportional Limit) (Elastic Behavior)

(B) (Elastic limit)(Permanent Deformation orOffset) (Plastic Deformation)

(Low Carbon Steel) () C C (Yield Point) (Yield Stress) Yield Strength Yield Strength

0.10 - 0.20% (Original Gage Length)


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1.4 (Proof Stress) 0.1 0.2% offset 1.4

1.4 : -

(D) Ultimate Strength (Tensile Strength)(Fracture) (Strength)

(

E)

(Fracture)

(Rupture Strength) D (Cold Work) 1.5 a (Brittle Materials)

1.5 b


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1.5 : -

-(Yield Strength) 1. (Ductility)(Percentage Elongation)

(Reduction of Area) %El (%El ) (, Brittle)

2.Modulus of Elasticity or StiffnessModulus of elasticity (E) Young'sModulus Stiffness ksi (1 ksi=1000 psi) kgf/mm2 GPa Shear Modulus Modulus of Rigidity (G) E G (Stiffness, Rigidity) E G E G E G1.1 E G

1.1

Modulus of elasticity 106psi Shear Modulus 106psi

Aluminium alloy 10.5 4.0

Copper 16.0 6.0

Steel (plain carbon and low alloys) 29.0 11.0

Stainless Steel (18.8) 28.0 9.5

Titanium 17.0 6.5


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(Creep)

3 1.6

1.6 :

(OA) OA

() Modulus of elasticity(E) I (AB) II (BC) Creep Minimum Creep Rate III (CD) D 3 1.7

1.7 : Creep Curve Condition

3 2


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(Toughness)

(Toughness)

(Toughness) Modulus of Toughness ( ) ( ) (Tensile test) 1.8 Modulus ofToughness

1.8 : Modulus of Toughness (a) (b)

(Impact Test) Impact Energy, Impact Transition Temperature (ITT) (FractureSurface) (Dynamic Load)

Impact Energy (Dynamic Impact Force) 2Charpy Impact Test Izod Impact Test 2 1.9


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2 (

)

Impact Energy -

Charpy Izod Charpy test

IzodTest

V, U

1.9 : Charpy Izod

1.10 :


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Impact Energy Impact Energy1.11 Impact Transition Temperature (ITT)

ITT

Impact energy ITT ITT

ITT (1.12) ITT (Fracture Surface) ITT (Brittle Fracture) (DuctileFracture) 50:50 (Fracture Appearance Transition Temperature - FATT)

1.12

1.11 : 0


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5 10x10x50

KU 30/3 30 kg m 3

(Fatigue)(Ultimate Strength)

Fatigue 2 (Stress Concentration)

1.14 :

(106) Fatigue Strength Endurance Limit


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1.16 : Brinell

500-3000 kgf 1.0 -10 . 10-15 30 ()

(HB) P/D2

100 30, , 30-200 10

15-100 5, , , 3-20 1

2.45 . 444 627 HB

1.17 : Brinell

P/D2


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- oxide scale (heating) (cold working)

- 3 3 8

- 2

Brinell 1 1

2. Vickers Hardness Test

136() 10-15 Brinell (HV 5) (VHN 1500) 1-120 kgf Brinell

P/D2

HV =

HV Vicker (kgf/mm2)

P (kgf)

d d1d2(mm.)


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1.18 : Vickers Hardness Test

-

- oxide scale (heating) (cold working)

- 2.5 x y

- 1.5 ()

-

d1

d2


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3. Rockwell Hardness Test

Brinell Vicker 2 minor load major load

1.19 : Rockwell Hardness Test

Minor load

Major load minor load minor load

Rockwell 15 (superficial hardness scale) 1

1 : Rockwell

Major

laod, kgf

A (two scales-carbide and steel)

60 , (shallow case-hardening steel)

B 1/16 (1.588 .)

100 (Copper alloys), (softsteels), (aluminum alloys)

(malleable iron)


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Major

laod, kgf

C 150 , (hard cast irons), , , 100 HRB

D 100

E 1/8 (3.175.)

100 ,

F 1/16 (1.588 .)

60

G 1/16 (1.588 .)

150 (Phosphor bronze), -(beryllium copper), . 92 HRG

H 1/8 (3.175 .)

60 ,

K 1/8 (3.175 .)

150 anvil effect

L

1/4 (6.350 .)

60

anvil effectM

1/4 (6.350 .)100

anvil effectP

1/4 (6.350 .)150

anvil effectR

1/2 (12.70 .)60

anvil effectS

1/2 (12.70 .)100

anvil effectV

1/2 (12.70 .)150

anvil effect

2 ( major load) 64.0 HRC 64.0 Rockwell C major load 100 kgf


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Rockwell C B

> 1 A, C, D

> 10 2

- = (100 - ) x 0.002

- = (130 - ) x 0.002

>

-

- correction factor

(convex) correction factor ( 2) (Vanvil)


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2 : Correction factors

Correction factors

6.350 .

(0.250

)

9.525 .

(0.375

)

12.700

.

(0.500

)

15.875

.

(0.625

)

19.050

.

(0.750

)

22.225

.

(0.875

)

25.400

.

(1.000

)

1/16 (1.588 .) (Rockwell B, F G)

0 * * * * 4.5 3.5 3.0

10 * * * 5.0 4.0 3.5 3.0

20 * * * 4.5 4.0 3.5 3.0

30 * * 5.0 4.5 3.5 3.0 2.5

40 * * 4.5 4.0 3.0 2.5 2.5

50 * * 4.0 3.5 3.0 2.5 2.0

60 * 5.0 3.5 3.0 2.5 2.0 2.0

70 * 4.0 3.0 2.5 2.0 2.0 1.5

80 5.0 3.5 2.5 2.0 1.5 1.5 1.5

90 4.0 3.0 2.0 1.5 1.5 1.5 1.0

100 3.5 2.5 1.5 1.5 1.0 1.0 0.5

(Rockwell C, D A)

20 * * * 2.5 2.0 1.5 1.5

30 * * 2.5 2.0 1.5 1.5 1.0

40 * 2.5 2.0 1.5 1.0 1.0 1.0

50 2.5 2.0 1.5 1.0 1.0 0.5 0.5

60 1.5 1.0 1.0 0.5 0.5 0.5 0.5

70 1.0 1.0 0.5 0.5 0.5 - -

80 0.5 0.5 0.5 - - - -

: * correction factor 5.0 ( Rockwell B, F G) 3.0 (Rockwell C, D A)


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- ()

gooseneck adapter

- 2.5

4

3 :

BRINELLROCKWELL SUPERFICIAL ROCKWELL

10 m/m Ball

Diamond Brale1/16"

Ball"N" Brale Penetrater 3000 kgm Load

TENSILE

STRENGTH

150 kgf

C Scale

60 kgf

A Scale

100 kgf

D Scale

100 kgf

B Scale

15 kg

Load 15N

30 kg

Load 30N

45 kg

Load 45N

Dia. Of

Ball

Impression

in m/m

Hardness

Number

VICKERS

OR FIRTH

DIAMOND

HARDNESS

NUMBEREquivalent

1000 lb. Sq.

In.

80 92 87 97 92 87 1865

79 92 86 92 87 1787

78 91 85 96 91 86 1710

77 91 84 91 85 1633

76 90 83 96 90 84 1556

75 90 83 89 83 1478

74 89 82 95 89 82 1400

73 89 81 88 81 1323

72 88 80 95 87 80 1245

71 87 80 87 79 1160

70 87 79 94 86 78 1076

69 86 78 94 85 77 1004

68 86 77 85 79 942

67 85 76 93 84 75 894

66 85 76 93 83 73 854

65 84 75 92 82 72 2.25 745 820

64 84 74 81 74 2.30 710 789

63 83 73 92 80 70 2.30 710 763

62 83 73 91 79 69 2.35 682 746

61 82 72 91 79 68 2.35 682 720

60 81 71 90 78 67 2.40 653 697

59 81 70 90 77 66 2.45 627 674 326

58 80 69 89 76 65 2.55 578 653 315

57 80 69 89 75 63 2.55 578 633 304


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56 79 68 88 74 62 2.60 555 613 294

55 79 67 88 73 61 2.60 555 595 287

54 78 66 87 72 60 2.65 534 577 279

53 77 65 87 71 59 2.70 514 560 269

52 77 65 86 70 57 2.75 495 544 261

51 76 64 86 69 56 2.75 495 528 254

50 76 63 86 69 55 2.80 477 513 245

49 75 62 85 68 54 2.85 461 498 238

48 75 61 85 67 53 2.90 444 484 232

47 74 61 84 66 51 2.90 444 471 225

46 73 60 84 65 50 2.95 432 458 219

45 73 59 83 64 49 3.00 415 446 211

44 73 59 83 63 48 3.00 415 434 206

43 72 58 82 62 47 3.05 401 423 202

42 72 57 82 61 46 3.10 388 412 198

41 71 56 81 60 44 3.10 388 402 191

40 70 55 80 60 43 3.15 375 392 185

39 70 55 80 59 42 3.20 363 382 181

38 69 54 79 58 41 3.25 352 372 176

37 69 53 109 79 57 40 3.30 341 363 171

36 68 52 109 78 56 39 3.35 331 354 168

35 68 52 108 78 55 37 3.35 331 345 163

34 67 51 108 77 54 36 3.40 321 336 159

33 67 50 107 77 53 38 3.45 311 327 154

32 66 49 106 76 52 34 3.50 302 318 150

31 66 48 106 76 51 33 3.55 293 310 146

30 65 48 105 75 50 32 3.60 285 302 142

29 65 47 104 75 50 30 3.65 277 294 138

28 64 46 103 74 49 29 3.70 269 286 134

27 64 45 103 73 48 28 3.75 262 279 131

26 63 45 102 73 47 27 3.80 255 272 126

25 63 44 101 72 46 26 3.80 255 266 124

24 62 43 100 72 45 24 3.85 248 260 122

23 62 42 99 71 44 23 3.90 241 254 118

22 62 42 99 71 43 22 3.95 235 248 116

21 61 41 98 70 42 21 4.00 229 243 113

20 61 40 97 69 42 20 4.05 23 238 111

18 95 4.10 217 230 107

16 94 4.15 212 222 102

14 92 4.25 203 213 98

12 90 4.35 192 204 92

10 89 4.40 187 195 90

8 87 4.50 179 187 87

6 85 4.60 170 180 83

4 84 4.65 166 173 79


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2 82 4.80 156 166 77

0 81 4.80 156 160 74

79 4.90 149 156 73

77 5.00 143 150 70

74 5.10 137 143 67

72 5.20 131 137 65

70 5.30 126 132 62

68 5.40 121 127 60

65 5.50 116 122 58

5.60 112 117 56

:

- http://www.isit.or.th/-


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1. )kinematic) 2. (kinetics)3. 4. 5. 6.7. 8. 9.
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