Ti-15V-3Cr-3Sn-3Al Sheet

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Ti-15V-3Cr-3Sn-3Al Sheet
Ti-15V-3Cr-3Sn-3Al Rod

Ti-15333 Sheet

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EHardness of Ti-15V-3Cr-3Sn-3Al Sheets/Plate

Form  δ/mm θ/℃ State Hardness HV Hardness HRC
Sheet 1.5 20 800℃, 6min, air cooling 212 27
ST+540℃, 8h, air cooling - 39
ST+520℃, 10h, air cooling 314 40.6

Mechanical properties of Ti-15V-3Cr-3Sn-3Al sheets

Properties of Ti-15V-3Cr-3Sn-3Al sheets
Form  δ or d/mm Sampling direction State Room temperature
σb/MPa σP0.2/MPa δ50/% δ5/% ψ/% α/(°) t/MPa
Sheet ≤3.0 LT Solution treatment 705～945 690～870 ≥12 - - ≥105 -
ST+540℃, 8h, air cooling ≥1000 ≥965 ≥7 - - - -
ST+540℃, 8h, air cooling ≥1080 ≥1010 ≥6 - - - -
ST+540℃, 8h, air cooling ≥1000 ≥1170 ≥5 - - - -

1）δ≤1.8mm，D=4δ; δ＞1.8~3.0mm，D=5δ

Tensile properties of Ti-15V-3Cr-3Sn-3Al Sheets
Form δ/mm Sampling direction State θ/℃ σb/MPa σp0.01/MPa σp0.2/MPa σp0.7/MPa σp0.85/MPa δ50/%
sheet 1.5 LT 800℃, 6min, air cooling 20 787 711 783 787 780 20.5
100 707 582 681 688 678 19.2
200 676 591 645 660 637 18.1
ST+540℃, 8h, air cooling -70 1263 - - - - 8.3
20 1109 842 1021 1094 1014 11
100 1097 741 947 987 940 10.2
150 1068 - 922 961 911 9.7
200 1009 659 888 927 879 9
250 1001 - 865 906 856 8.6
300 979 698 848 888 839 8.2
350 966 640 831 876 822 8.4
ST+520℃, 10h, air cooling -70 1343 - - - - 7.3
20 1182 908 1089 1121 1089 10.2
100 1136 798 1011 1051 1004 9.6
150 1105 - 973 1013 967 9.1
200 1072 714 948 991 939 8.4
250 1057 - 928 971 916 8.1
300 1045 695 905 954 895 7.6
350 1020 612 884 925 873 7.4
ST+480℃, 16h, air cooling -70 1493 - - - - 6.2
20 1315 - 1207 - - 8.5

Compression performance of Ti-15V-3Cr-3Sn-3Al Sheets
Form δ/mm State Sampling direction θ/℃ σp0.2/MPa
Sheet  2 ST+540℃, 8h, air cooling LT 20 1050
ST+520℃, 10h, air cooling 1157

Bearing capacity of Ti-15V-3Cr-3Sn-3Al Sheets
Form δ/mm State Sampling direction θ/℃ e/D σbru/MPa σbry/MPa
Sheet 1.5 800℃, 8min, air cooling LT 20 1.5 1357 1137
2 1884 1294
ST+540℃, 8h, air cooling LT 20 1.5 1724 1458
2 2102 1646
ST+520℃, 10h, air cooling LT 20 1.5 1828 1629
2 2154 1871

Thermal stability of Ti-15V-3Cr-3Sn-3Al Sheets
Form δ/mm State Sampling direction eat exposure conditions σb/MPa σp0.2/MPa δ50/%
θ/℃ t/h
Sheet 1.5  ST+540℃, 8h, air cooling  LT not exposed 1123 1042 10.1
300 100 1127 1038 10.5
300 1138 1049 10.1
500 1137 1045 10.2
 ST+520℃, 10h, air cooling  not exposed 1128 1125 8.7
300 100 1214 1122 8.7
300 1226 1136 8.7
500 1213 1128 8.5
 ST+480℃, 16h, air cooling  not exposed 1315 1207 8.5
300 100 1322 1230 8.4
300 1342 1257 8.1
500 1330 1238 9
1.8 ST+ cold rolling10% +540℃, 8h, air cooling LT not exposed 1294 1214 7.3
300 500 1297 1212 6.7
ST+ cold rolling10% +520℃, 10h, air cooling not exposed 1383 1303 5.4
300 500 1396 1302 5.2
1.6 ST+ cold rolling20% +540℃, 8h, air cooling LT not exposed 1289 1194 7
300 500 1302 1215 6.2
ST+ cold rolling20% +520℃, 10h, air cooling not exposed 1398 1320 4.8
300 500 1411 1317 5

Persistence and creep properties of Ti-15V-3Cr-3Sn-3Al Sheets
Form δ/mm State Sampling direction θ/℃ σ100/MPa σ0.2/100/MPa
Sheet 1.5 800℃, 6min, air cooling + 520℃, 10h, air cooling LT 300 1030 800

Fatigue performance of Ti-15V-3Cr-3Sn-3Al Sheets
Form δ/mm State Sampling direction σb/MPa σp0.2/MPa Kt R f/Hz N/circle σD/MPa
Sheet  1.5 800℃, 6min, air cooling + 540℃, 8h, air cooling LT 1109 1021 1 0.1 116 107 625
3 0.1 116 107 290
800℃, 6min, air cooling + 520℃, 10h, air cooling LT 1182 1098 1 0.1 116 107 615
3 0.1 116 107 298
5 0.06 86 5 x 106 160
2.5① 0.06 86 5 x 106 315
0.5 86 5 x 106 408

① The width of the working part of the sample is 15mm, and the diameter of the central hole is 3mm

Room temperature smooth notch (Kt=3) S-N curves of Ti-15V-3Cr-3Sn-3Al sheets aged at 540℃

Room temperature smooth notch (Kt=3) S-N curves of Ti-15V-3Cr-3Sn-3Al sheets aged at 540℃

Room temperature smooth notch (Kt=3) S-N curves of Ti-15V-3Cr-3Sn-3Al sheets aged at 520℃

Room temperature smooth notch (Kt=3) S-N curves of Ti-15V-3Cr-3Sn-3Al sheets aged at 520℃

Tensile modulus of elasticity
Form δ/mm State Sampling direction θ/℃ E/GPa
Sheet 1.5 800℃, 6min, air cooling LT 20 77.3
100 77.9
200 76.9
LT 20 102
ST+540℃, 8h, air cooling 100 101
200 96.8
300 89.7
ST+520℃, 10h, air cooling LT 20 102
100 100
200 97.6
300 93.9
350 91.6

Compression modulus of elasticity
Form δ/mm State Sampling direction θ/℃ Ec/GPa
Sheet 2 800℃, 8min, air cooling + 540℃, 8h, air cooling LT 20 101
800℃, 8min, air cooling + 520℃, 10h, air cooling 20 103

Fracture performance of Ti-15V-3Cr-3Sn-3Al sheets
Form δ/mm State Sample type Sampling direction θ/℃ Kc/MPa·m σb/MPa σp0.2/MPa
Sheet 1.5 800℃, 6min, air cooling + 540℃, 8h, air co CT T-L  20 113.4 1109 1021
800℃, 6min, air cooling + 520℃, 10h, air co 　 91.1 1182 1089
800℃, 6min, air cooling + 480℃, 16h, air co 　 79.7 1315 1207
2 800℃, 8min, air cooling + 540℃, 8h, air cooling CT L-T 20 106.8 1081 997
T-L  　 107.4 1108 1012
800℃, 8min, air cooling + 520℃, 16h, air cooling T-L  20 91.5 1206 1119

Manufacturing process and performance of Ti-15V-3Cr-3Sn-3Al sheets

1. Cold forming properties

Cold forming properties of Ti-15V-3Cr-3Sn-3Al sheets
Form δ/mm State θ/℃ Cupping value/mm Ultimate drawing coefficient Limit flanging coefficient Lug rate/%  Hole expansion rate/%
Sheet 1.5 800℃, 6min, air cooling 20 10.2 1.8 - - 51
1.2 　 9.5 1.8 2 6.5 58.7
0.8 　 8 1.8 - 4.7 -

Bending properties of Ti-15V-3Cr-3Sn-3Al sheets
Form δ/mm State /  θ/℃ Sampling direction Minimum bending radius/mm Average rebound angle/(°)
Sheet 1.5 800℃, 6min, air cooling 20 L 0.8 9
LT 1 8
1.2 800℃, 6min, air cooling L 0.6 8
LT 0.8 9.5
0.8 800℃, 8min, air cooling L 0.4 9
LT 0.4 8.5

2. Superplastic forming process of sheet
According to the relationship between the tensile strength, elongation after fracture and m value of Ti-15V-3Cr-3Sn-3Al sheet and the deformation temperature, the recommended superplastic forming process can use the sheet in the state of cold rolling or solution treatment, and the forming temperature Choose 700~740℃ below the β transition temperature, and the strain rate can be in a wide range, not greater than 2.8 x 10^(-3) s^(-1). The superplastic formed parts should be furnace-cooled from the forming temperature to 500~540°C as soon as possible, kept for 2 hours, and continue to be furnace-cooled to below 200°C. When the strength of the parts is not high, it can also be directly cooled from the forming temperature to below 200°C.