scholarly journals Transformation from slip to plastic flow deformation mechanism during tensile deformation of zirconium nanocontacts

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Kohei Yamada ◽  
Tokushi Kizuka
Keyword(s):  
Plastic Flow ◽  
Deformation Mechanism ◽  
Tensile Deformation ◽  
Flow Deformation

scholarly journals Flow deformation characteristics of African blackwood, Dalbergia melanoxylon

2020 ◽  
Vol 66 (1) ◽  
Author(s):  
Kazushi Nakai ◽  
Soichi Tanaka ◽  
Kozo Kanayama ◽  
Tsuyoshi Yoshimura
Keyword(s):  
Plastic Flow ◽  
Local Community ◽  
Tangential Direction ◽  
Musical Instruments ◽  
Deformation Characteristics ◽  
Compression Tests ◽  
Flow Forming ◽  
Community Forests ◽  
Flow Deformation ◽  
Dalbergia Melanoxylon

Abstract African blackwood (ABW: Dalbergia melanoxylon) is a valuable tree in Tanzanian local community forests, and heartwood has been mainly utilized as an irreplaceable material in musical instruments, e.g., clarinet, oboe and piccolo. Since its use is generally for the production of musical instruments only, most of the harvested volume is wasted due to defects that would affect the quality of final products. Wood flow forming can transform bulk woods into materials in temperature/pressure-controlled mold via plastic flow deformation. The main object of this study was to evaluate the deformation characteristics of ABW heartwood in developing the potential of wasted ABW parts in terms of the effective material use. The deformation characteristics of heartwood were examined by free compression tests. Specimens were compressed along the radial direction at 120 °C, and air-dried heartwood was dramatically deformed in the tangential direction. The plastic flow deformation of ABW was amplified by the presence of both extractives and moisture. In particular, the ethanol/benzene (1:2, v/v) soluble extractives in heartwood may have contributed to flow deformation. The results of the dynamic mechanical analysis showed that the air-dried heartwood exhibited softening in a temperature range over 50 °C. The ethanol/benzene-soluble extractives contributed to the softening behavior. The clarified deformation characteristics of ABW can contribute to more efficient material use of local forests.

Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

2020 ◽  
Vol 22 (3) ◽  
pp. 1901193 ◽  
Author(s):  
Y. C. Lin ◽  
Qiao Wu ◽  
Guo-Dong Pang ◽  
Xing-You Jiang ◽  
Dao-Guang He
Keyword(s):  
Deformation Mechanism ◽  
Tensile Deformation ◽  
Softening Behavior ◽  
Dynamic Softening ◽  
Hot Tensile Deformation

Synchroshear Versus Conventional Shear Mechanisms in Transitionmetal Disilicides with the C40 Structure

1999 ◽  
Vol 578 ◽  
Author(s):  
H. Inui ◽  
M. Yamaguchi
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Plastic Flow ◽  
Deformation Mechanism ◽  
Deformation Behavior ◽  
Basal Slip ◽  
Room Temperature ◽  
Onset Temperature ◽  
Factors Affecting ◽  
Temperature Group

AbstractThe deformation behavior of (0001) <1210> basal slip in single crystals of five different transitionmetal disilicides with the C40 structure has been investigated in the temperature range from room temperature to 1500°C in compression. These disilicides are found to be classified into two groups depending on the onset temperature for plastic flow. The low-temperature group, which consists of VSi2, NbSi2 and TaSi2, exhibits the onset temperature for plastic flow around 0.3 T/Tm (melting temperature) and deforms by a conventional shear mechanism. In contrast, the high temperature group, which consists of CrSi2 and Mo(Si,Al)2, exhibits the onset temperature around 0.6T/Tm and deforms by a synchroshear mechanism. Factors affecting the deformation mechanism in these C40 disilicides are discussed in terms of directionality of atomic bonding and the relative stability of the C40 phase with respect to the C11b phase.

Tensile deformation mechanism of Sn-37Pb solder alloy at cryogenic temperatures

2021 ◽  
Author(s):  
Xiaotong Guo ◽  
Kun Zhang ◽  
Jiahao Liu ◽  
Yong Li ◽  
Xinlang Zuo ◽  
...  
Keyword(s):  
Solder Alloy ◽  
Deformation Mechanism ◽  
Tensile Deformation ◽  
Cryogenic Temperatures

scholarly journals The Influence of Warm Rolling Reduction on Microstructure Evolution, Tensile Deformation Mechanism and Mechanical Properties of an Fe-30Mn-4Si-2Al TRIP/TWIP Steel

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 742 ◽  
Author(s):  
Yanchun Dong ◽  
Zhilin Sun ◽  
Hao Xia ◽  
Jianhang Feng ◽  
Jiejie Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Martensitic Transformation ◽  
Microstructure Evolution ◽  
Deformation Mechanism ◽  
Twip Steel ◽  
Tensile Deformation ◽  
Warm Rolling ◽  
Rolling Reduction ◽  
Dislocation Glide ◽  
Work Hardening Rate

The effects of warm rolling reduction ratio ranging from 20% to 55% on microstructure evolution, the tensile deformation mechanism, and the associated mechanical properties of an Fe-30Mn-4Si-2Al TRIP/TWIP steel were studied. The warm rolling process resulted in the formation and proliferation of sub-structure, comprising dislocations, deformation twins as well as shear bands, and the densities of dislocation and twins were raised along with the increase in rolling reduction. The investigated steel, with a fully recrystallized state, exhibited a single ε-TRIP effect during the room temperature tensile deformation, on top of dislocation glide. However, the formation and growth of twin lamellae and ε-martensite were detected simultaneously during tensile deformation of the warm rolled specimen with rolling reduction of 35%, leading to a good balance between high yield strength of 785 MPa, good total ductility of 44%, and high work hardening rate. As the rolling reduction increased to 55%, the specimen revealed a relatively low work hardening rate, due to the high dislocation density, and dislocation glide was the main deformation mechanism. As a result, a tensile deformation mechanism that started from a single ε-martensitic transformation moved to a bi-mode of ε-martensitic transformation accompanied with deformation twinning, and finally to dislocation glide with the increasing warm rolling reduction was proposed.

Anomalous Twinning as the Macroscopic Deformation Mechanism for AZ31 Magnesium Alloy

2019 ◽  
Vol 810 ◽  
pp. 95-100
Author(s):  
Yusuke Onuki ◽  
Shigeo Sato
Keyword(s):  
Magnesium Alloy ◽  
Deformation Mechanism ◽  
Tensile Deformation ◽  
Tensile Axis ◽  
Rolling Direction ◽  
Az31 Magnesium Alloy ◽  
Uniaxial Tensile ◽  
Rolled Sheet ◽  
Prism Slip ◽  
Texture Measurement

In order to study the plastic deformation mechanism of AZ31 magnesium alloy, in situ texture measurement during uniaxial tensile deformation is conducted by using neutron diffraction. The specimen is prepared from a rolled sheet so that the deformation axis is parallel to the rolling direction. By increasing strain, the alignment of <10-10> along the tensile axis is strengthened, which is due to the activation of the prism slip system. The basal pole concentration at the prior sheet normal direction is slightly decreased by the deformation and the new texture component is formed at the transvers direction. This can be understood by activation of the {10-12} tension twinning. These results indicate that the tension twinning plays an important role even when the tensile deformation is applied parallel to the basal plane.

scholarly journals Tensile deformation mechanism and micro-void nucleation of Ti-55531 alloy with bimodal microstructure

2020 ◽  
Vol 9 (6) ◽  
pp. 15442-15453 ◽  
Author(s):  
Di Wu ◽  
Libin Liu ◽  
Ligang Zhang ◽  
Wanlin Wang ◽  
Kechao Zhou
Keyword(s):  
Deformation Mechanism ◽  
Tensile Deformation ◽  
Void Nucleation ◽  
Bimodal Microstructure
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