Strain Rate Sensitivity of Ultrafine-Grained CP-Ti Processed by ECAP at Room Temperature

Liu, Xiao Yan; Zhao, Xi; Yang, Xi

doi:10.4028/www.scientific.net/msf.667-669.707

Cited by 4 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the analysis of mechanical properties under various conditions of thermal and deformation treatment of the material, it is possible to compare the results with the values of recommended mechanical properties of the material 316L according to works [30][31][32] for fusion reactor. The initial state had about 30 % higher At values as compared to conventionally rolled material At ≤ 42 % [31,32]. The initial state tested at Tt = 77K retained a high At value with almost doubling the strength properties.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Influence of cryorolling on properties of L-PBF 316l stainless steel tested at 298K and 77K

Petroušek¹,

Kvačkaj²,

Kočiško³

et al. 2019

Acta Metall Slovaca

View full text Add to dashboard Cite

<p class="AMSmaintext">The goal of the present work is to evaluate mechanical properties and to analyse the microstructure of 316L stainless steel produced by Laser Powder Bed Fusion (L-PBF) follow by rolling with different thickness reduction under ambient and cryogenic conditions. The samples before rolling were heat treated. The static tensile test was realized at ambient and cryogenic (77K) conditions. The L-PBF powder metal production technology approved that is a key technology in the AM area, especially for metal powder materials. Mechanical properties tested at 298K and 77K shows that the application of various thermo-deformation rolling conditions increases of strength properties. Achieved mechanical properties are comparable to conventional bulk materials. The strength properties after the rolling under ambient and cryogenic conditions were significantly increased.<strong></strong></p>

show abstract

Section: Mechanical Propertiesmentioning

confidence: 99%

Influence of cryorolling on properties of L-PBF 316l stainless steel tested at 298K and 77K

Petroušek¹,

Kvačkaj²,

Kočiško³

et al. 2019

Acta Metall Slovaca

View full text Add to dashboard Cite

show abstract

“…The more detailed calculation of the strain rate sensitivity m is the same as the description in Ref. 29. The development of the strain rate sensitivity m in dependence of temperature T is shown in Fig.…”

Section: Strain Rate Sensitivity Of Flow Stressmentioning

confidence: 99%

Compression deformation behaviours of ultrafine and coarse grained commercially pure titanium

Liu

Zhao

Yang

et al. 2013

Materials Science and Technology

View full text Add to dashboard Cite

Hot compression deformation behaviours of ultrafine grained (UFG) and coarse grained (CG) commercially pure (CP)-Ti were investigated and compared by isothermal simulation tests. Strains over 50% were achieved in these tests over a temperature range of 298-823 K and strain rate of 10 24 -10 22 s 21 . The results show that the peak stresses of UFG and CG CP-Ti fall with increasing deformation temperature and decreasing strain rate. Within the plastic deformation regime, the compressive stress-strain responses of UFG and CG CP-Ti exhibit quite different features, which strongly depend on the temperature and strain rate. The flow stress of CG CP-Ti monotonically increases with strain, while that of UFG CP-Ti increases first and then tends to be constant after a peak value below recrystallisation temperature. The stress-strain curves of UFG CP-Ti show similar characteristic with those of CG CP-Ti as the temperature is above recrystallisation temperature. Strain rate sensitivity values m of the UFG CP-Ti increase with the rise in temperature and are higher than those of CG CP-Ti. It can be concluded that deformation of UFG CP-Ti is controlled by grain boundary and dislocation activity.

show abstract

“…Studies on the influence of the strain rate on the mechanical and structural properties are mainly carried out on previously deformed materials or on coarse-crystalline materials using standard static or dynamic tests. Such studies have been carried out for many materials, mainly after the ECAP process, such as magnesium alloys, aluminum alloys or titanium, but also after ARB (accumulative roll-bonding) or cold rolling processes [ 10 , 11 , 12 , 13 , 14 ]. In the case of zinc, such work was carried out in dynamic compression tests, where the leading role of the continuous dynamic recrystallization process at higher compression rates (~0.5 s −1 ) was observed [ 1 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Strain Rates during Severe Plastic Strain Processes on Microstructural and Mechanical Evolution in Pure Zinc

et al. 2022

View full text Add to dashboard Cite

The study presents an analysis of the influence of the plastic strain rate on the mechanical and structural properties of pure zinc. Thanks to the use of unconventional methods of plastic processing, the process of the equal channel angular pressing (ECAP) and the process of hydrostatic extrusion (HE), the tests were performed in a wide range of plastic strain rates, between 0.04 s−1 and 170 s−1. Plastic strain rate changes were carried out in the course of the significant plastic strain processes, and not on previously deformed samples. All tests were carried out at a constant value of plastic strain rate, ε ~ 2. A strong influence of the plastic strain rate on changes in the microstructure in zinc was observed during the tests. For the rates in the range of 0.04 s−1 to 0.53 s−1 its bimodal nature was observed, and in the range of 7 s−1 to 170 s−1 high homogeneity and evenness of grains related to the processes of continuous dynamic recrystallization was noticed. The effect of the strong homogenization of the microstructure was the increase in mechanical properties, yield point and tensile strength to the maximum values of UTS = 194 MPa, YS = 145 MPa at a strain rate of 170 s−1. Compared to the material with a bimodal microstructure, an over seven-fold increase in the elongation value was observed.

show abstract

Strain Rate Sensitivity of Ultrafine-Grained CP-Ti Processed by ECAP at Room Temperature

Cited by 4 publications

References 26 publications

Influence of cryorolling on properties of L-PBF 316l stainless steel tested at 298K and 77K

Influence of cryorolling on properties of L-PBF 316l stainless steel tested at 298K and 77K

Compression deformation behaviours of ultrafine and coarse grained commercially pure titanium

Influence of Strain Rates during Severe Plastic Strain Processes on Microstructural and Mechanical Evolution in Pure Zinc

Contact Info

Product

Resources

About