February 2022 Volume 4

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FORGING RESEARCH

Table 3: Mechanical properties of IN718 after forging.

Heat Treatment Table 3: Mechanical properties of IN718 after forging. Table 3: Mechanical properties of IN718 after forging. Grain Size (um) Ultimate Strength (Mpa)

Yield Strength (MPa)

Elongation (%)

A (1735F 1h + 1350F age) Heat Treatment Heat Treatment B (1850F 3h + 1350F age)

Grain Size (um) Grain Size (um)

Ultimate Strength (Mpa) Ultima e Strength (Mpa)

11 Yield Strength (MPa) Yield Strength (MPa)

Elongation (%) Elongation (%)

1 – 2

1331

1007

3

1393

1213

13

A (1735F 1h + 1350F age) A (1735F 1h + 1350F age) B (1850F 3h + 1350F age) B (1850F 3h + 1350F age) C (1800F 3h + 1350F age) C (1800F 3h + 1350F age)

1 – 2

1331

1007

11

1 – 2

1331

1007

11

C (1800F 3h + 1350F age)

3

1379

1089

12

3

1393

1213

13

3

1393

1213

13

D (1800F 5h + 1350F age)

1

1400

1138

13

3

1379

1089

12

3

1379

1089

12

Table 4: Mechanical properties of IN718 fter fo ging. D (1800F 5h + 1350F age) 1 1400

1138

13

Table 3: Mechanical properties of IN718 after forging.

D (1800F 5h + 1350F age)

1

1400

1138

13

Grain Size (um)

Ultimate Strength (Mpa)

Yield Strength (MPa) Elongation (%)

Table 4: Mechanical properties of IN718 after forging. Table 4: Mechanical properties of IN718 after forging. Table 3: Mechanical properties of IN718 after forging.

Grain Size (um) Grain Size (um) Heat Treatment

Ultimate Strength (Mpa) Ultimate Strength (Mpa) Grain Size (um)

21.9 Yield Strength (MPa) Elongation (%) Yield Strength (MPa) Elongation (%) Ultimat Strength (Mpa) Yield Strength (MPa)

1

1184

920

Elongation (%)

0.3

1560

1300

5.1

1

1184

920

21.9

0.08

1920 A (1735F 1h + 1350F age) 1 1184

1845

4.8

1300 1331 1393 920 1300 1845 1379

5.1 21.9

1 – 2

1007

11

0.3

1560

0.3

1560

5.1

B (1850F 3h + 1350F age)

3

1213

13

Table 5: Mechanical properties of IN718 after forging and heat treatment. 0.08 1920 1845 4.8

0.08

1920

4.8

C (1800F 3h + 1350F age)

3

1089

12

State

Table 4: Mechanical properties of IN718 after forging. Table 5: Mechanical properties of IN718 after forging and heat treatment. Table 5: Mechanical properties of IN718 after forging and heat treatment. D (1800F 5h + 1350F ag ) 1 1400 1138 Grain Size (um) Elongation (%)

Ultimate Strength (Mpa)

Yield Strength (MPa)

Fatigue Strength (MPa)

Fatigue Strength (Cycles)

13

State

Grain Size (um) Grain Size (um)

Ultimate Strength (Mpa) Ultimate Strength (Mpa)

Yield Strength (MPa) Yield Strength (MPa)

Elongation (%) Elongation (%)

Fatigue Strength (MPa) Fatigue Strength (MPa) 910

Fatigue Strength (Cycles) Fatigue Strength (Cycles) 10^5

CG + HT 11 – 22 State Table 4: Mechanical properties of IN718 after forging. 1428/1176 1180/976 19/18

910

10^5

3.9 CG + HT 11 – 22 CG + HT 11 – 22 MC + HT 4.6 MC + HT 4.6 1 Grain Size (um)

1488/1169 1234/995 17/23 Ultimate Strength (Mpa) 1520/1164 1252/993 19/21

910 Yield Strength (MPa) Elongation (%) > 1.6*10^5

MC + HT 4.6

1428/1176 1180/976 19/18 1428/1176 1180/976 9/18 1488/1169 1234/995 17/23 1488/1169 1234/995 17/23 920

NS + HT

910

> 1.6*10^5 10^5

910

910

> 1.6*10^5 > 1.6*10^5 > 1.6*10^5 > 1.6*10^5

1184

21.9

910

Table 5: Mechanical properties of IN718 after forging and heat treatment. Table 5: Mechanical properti s of IN718 after forging and heat treatment. Table 6: Changes to ultimate and yield strength as grain size decreases. *Longitudinal/ transverse sheet direction Table 6: Changes to ultimate and yield strength as grai size decreases. *Longitudinal/ transverse sheet direction NS + HT 3.9 1520/1164 1252/993 19/21 910 Table 6: Changes to ultimate and yi ld strength as grain size decreases. *Longitudinal/ transverse sheet direction NS + HT 3.9 1520/1164 1252/993 19/21 910 0.3 1560 1300 5.1 0.08 1920 1845 4.8 Grain Size (um) Yield Strength (MPa) Elongation (%)

Ultimate Strength (Mpa) Grain Size (um)

Grain Size (um) Grain Size (um) State

Ultimate Strength (Mpa) Ultimate Strength (Mpa)

Yield Strength (MPa) Yield Strength (MPa)

Elongation (%) Elongation (%) Elongation (%)

0.5

1699/1583* 1438/1298 5.4/3.2

1300 Ultimate Strength (Mpa)

5.1 Yield Strength (MPa)

Fatigue Strength (MPa)

Fatigue Strength (Cycles)

0.3

1560

0.5

1699/1583* 1438/1298 5.4/3.2 1699/1583* 1438/1298 5.4/3.2 1428/1176 1 80/976 19/18

0.5 CG + HT 11 – 22

910

10^5

0.08

1920

1845

4.8

0.3

1560 1560 1920 1920

1300 1300 1845 1845

5.1

MC + HT 4.6

1488/1169 1234/995 17/23

910

> 1.6*10^5

0.3

5.1

0.08 NS + HT 0.08

4.8

3.9

1520/1164 1252/993 19/21

910

> 1.6*10^5

4.8

Table 6: Changes to ultimate and yield strength as grain size decreases. *Longitudinal/ transverse sheet direction Table 6: Changes to ultimate and yield strength as grain size decreases. *Longitudinal/ transverse sheet direction Table 7: Stress rupture d ta at 650C of IN718 after forging and heat treatment.

Grain Size (um)

Ultimate Strength (Mpa)

Yield Strength (MPa)

Elongation (%)

State

Stress (MPa)

Time (hrs)

Elongation (%)

0.5

1699/1583* 1438/1298 5.4/3.2

MC + HT

710

29.8

20.2

0.3

1560

1300

5.1

NS + HT

710

27.0

25.3

0.08

1920

1845

4.8

Table 7: Stress rupture data at 650C of IN718 after forging and heat treatment. Table 8: Changes to scale C of the Rockwell Hardness Test as grain size decreases.

Grain Size (um) (Long. + Trans.)/2

Hardness (HRC) Long.

Hardness (HRC) Trans.

113

29

32

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