1. deakin.edu.au
Deakin University CRICOS Provider Code: 00113B
Investigations into machinability of lean duplex steel
Atinderpal Singh
Supervisor name: Junior Nomani
School of Engineering
OBJECTIVE:-
To find the behavior of newly developed lean duplex steels under different machining parameters. This would help
machinists for making various products from this steel in the future by using results of this experiment.
METHODOLOGY :-
Results and outcomes :-
Grade C Ni Cr N Mo S Mn UTS (MPa
Min.)
0.2% Yield
(MPa Min.)
Hardness
Brinell
Max.
2101 0.03 1.5 21.5 0.19-
0.22
0.3 0.005 4.0-
5.0
648.1073 448.1593 290
2205 0.02 5.2 22.4 0.04-
0.20
3.05 0.01 0.8 655.0021 448.1593 217
316L 0.03 10.5 17 0.10 2.0-
3.0
0.03 1.5 517.1069 206.842 293
This experiment will help find to :-
1. appropriate cutting speed, feed rate and depth of
cut for machining these materials.
2. surface texture and cutting forces analysis
3. Tool wear and tool Life
(Duplex stainless steels are finding a lot of
applications in petrochemical and bridge construction
industries)
778.503 795.48
1268.3715
530.2 521.179 511.121
798.489
1589.11
1632.107
0
200
400
600
800
1000
1200
1400
1600
1800
5 8 11 14 17 20 23 26
MaximumFx[N]
No. Of Passes
2101 Fx Max 316L Fx Max 2205 Fx max
570.404
661.486
1022.766
476.013 467.529 451.721
659.987
1301.06
1160.13
0
200
400
600
800
1000
1200
1400
5 8 11 14 17 20 23 26
MaximumFy[N]
No. Of Passes
2101Fy Max 316L Fy Max 2205 Fy Max
0.51142
0.5665007
0.457117
0.670348
0.627535
0.548995
0.98821
0.863768
0
0.2
0.4
0.6
0.8
1
1.2
8 16 24
RainMicro-meters
Number of Passes
Roughness
2101Avg. Ra
316L Avg. Ra
2205 AVG Ra
Conclusions:-
• Forces produced in 2101 are lesser than 2205
• Cutting forces increased with no. of passes
• After 8 passes, abrupt increase in cutting forces
• 2101 Gives finest surface texture as compared to 316L
and 2205
• Tool breakdown on 17th pass in case of 2205
• Tool wear 316L< 2101 < 2205
• Flank & chipping wear noticed in 2101 while spalling
in 316L and thermal cracking is predominant in 2205
![deakin.edu.au
Deakin University CRICOS Provider Code: 00113B
Investigations into machinability of lean duplex steel
Atinderpal Singh
Supervisor name: Junior Nomani
School of Engineering
OBJECTIVE:-
To find the behavior of newly developed lean duplex steels under different machining parameters. This would help
machinists for making various products from this steel in the future by using results of this experiment.
METHODOLOGY :-
Results and outcomes :-
Grade C Ni Cr N Mo S Mn UTS (MPa
Min.)
0.2% Yield
(MPa Min.)
Hardness
Brinell
Max.
2101 0.03 1.5 21.5 0.19-
0.22
0.3 0.005 4.0-
5.0
648.1073 448.1593 290
2205 0.02 5.2 22.4 0.04-
0.20
3.05 0.01 0.8 655.0021 448.1593 217
316L 0.03 10.5 17 0.10 2.0-
3.0
0.03 1.5 517.1069 206.842 293
This experiment will help find to :-
1. appropriate cutting speed, feed rate and depth of
cut for machining these materials.
2. surface texture and cutting forces analysis
3. Tool wear and tool Life
(Duplex stainless steels are finding a lot of
applications in petrochemical and bridge construction
industries)
778.503 795.48
1268.3715
530.2 521.179 511.121
798.489
1589.11
1632.107
0
200
400
600
800
1000
1200
1400
1600
1800
5 8 11 14 17 20 23 26
MaximumFx[N]
No. Of Passes
2101 Fx Max 316L Fx Max 2205 Fx max
570.404
661.486
1022.766
476.013 467.529 451.721
659.987
1301.06
1160.13
0
200
400
600
800
1000
1200
1400
5 8 11 14 17 20 23 26
MaximumFy[N]
No. Of Passes
2101Fy Max 316L Fy Max 2205 Fy Max
0.51142
0.5665007
0.457117
0.670348
0.627535
0.548995
0.98821
0.863768
0
0.2
0.4
0.6
0.8
1
1.2
8 16 24
RainMicro-meters
Number of Passes
Roughness
2101Avg. Ra
316L Avg. Ra
2205 AVG Ra
Conclusions:-
• Forces produced in 2101 are lesser than 2205
• Cutting forces increased with no. of passes
• After 8 passes, abrupt increase in cutting forces
• 2101 Gives finest surface texture as compared to 316L
and 2205
• Tool breakdown on 17th pass in case of 2205
• Tool wear 316L< 2101 < 2205
• Flank & chipping wear noticed in 2101 while spalling
in 316L and thermal cracking is predominant in 2205](https://image.slidesharecdn.com/ba661781-5b01-4a69-bee9-faa079f7261b-160616051222/85/Atinderpal-Poster-1-320.jpg)
