Acta Metallurgica Sinica (English Letters) ›› 2021, Vol. 34 ›› Issue (5): 701-709.DOI: 10.1007/s40195-020-01165-2
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Xiaohui Shi1(), Zuhan Cao1, Zhiyuan Fan1, Ruipeng Guo1, Junwei Qiao1
Received:
2020-06-29
Revised:
2020-09-13
Accepted:
2020-09-20
Online:
2021-05-10
Published:
2021-04-30
Contact:
Xiaohui Shi
About author:
Xiaohui Shi, sxhtough@126.comXiaohui Shi, Zuhan Cao, Zhiyuan Fan, Ruipeng Guo, Junwei Qiao. Probing into the Yield Plateau Phenomenon in Commercially Pure Titanium During Tensile Tests[J]. Acta Metallurgica Sinica (English Letters), 2021, 34(5): 701-709.
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Fig. 3 Metallographic images of CP Ti under different treatments: a 91.6% CR, b 91.6% CR, 280 °C/1 h, AC, c 91.6% CR, 450 °C/1 h, AC, d 91.6% CR, 600 °C/30 min, AC
Conditions | YS (MPa) | UTS (MPa) | EL (%) | YP length (%) |
---|---|---|---|---|
As-received | 298 | 411 | 39.9 | 0 |
91.6% CR | 758 ± 4 | 801 ± 1 | 5.3 ± 0.4 | 0 |
91.6% CR, 280 °C/1 h, AC | 600 ± 22 | 645 ± 32 | 6.3 ± 0.4 | 0 |
91.6% CR, 335 °C/1 h, AC | 519 ± 3 | 602 ± 3 | 9.4 ± 0.5 | 0 |
91.6% CR, 450 °C/1 h, AC | 457 ± 11 | 506 ± 12 | 14.7 ± 0.9 | 0 |
91.6% CR, 600 °C/30 min, AC | 350 ± 5 | 440 ± 14 | 29.8 ± 0.1 | 2.2 ± 0.1 |
Table 1 Tensile properties of CP Ti under different conditions
Conditions | YS (MPa) | UTS (MPa) | EL (%) | YP length (%) |
---|---|---|---|---|
As-received | 298 | 411 | 39.9 | 0 |
91.6% CR | 758 ± 4 | 801 ± 1 | 5.3 ± 0.4 | 0 |
91.6% CR, 280 °C/1 h, AC | 600 ± 22 | 645 ± 32 | 6.3 ± 0.4 | 0 |
91.6% CR, 335 °C/1 h, AC | 519 ± 3 | 602 ± 3 | 9.4 ± 0.5 | 0 |
91.6% CR, 450 °C/1 h, AC | 457 ± 11 | 506 ± 12 | 14.7 ± 0.9 | 0 |
91.6% CR, 600 °C/30 min, AC | 350 ± 5 | 440 ± 14 | 29.8 ± 0.1 | 2.2 ± 0.1 |
Fig. 6 Typical TEM images of CP Ti specimen after 600 °C annealing and subsequent tensile test for a plastic strain of near 1%: a-f the dense dislocations including high-density dislocation walls distributed in α grains, g a twin penetrating α grain, h, i the enlarged views of g
Fig. 8 Typical TEM images of as-received CP Ti specimen after tensile test for a plastic strain of near 4%: (a, b) dislocation features, (c-f) twins’ features
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