scholarly journals Effect of precipitation size on dislocation density change during tensile deformation in Al-Zn-Mg alloy

2021 ◽  
Vol 71 (8) ◽  
pp. 343-348
Author(s):  
Masahiro Hirata ◽  
Koichi Iwata ◽  
Daisuke Okada ◽  
Hiroki Adachi
Keyword(s):  
Dislocation Density ◽  
Tensile Deformation ◽  
Density Change ◽  
Mg Alloy

scholarly journals Measurement of Dislocation Density Change during Tensile Deformation in Coarse-Grained Aluminum by In-Situ XRD Technique with Tester Oscillation

2021 ◽  
Vol 62 (1) ◽  
pp. 62-68
Author(s):  
Hiroki Adachi ◽  
Hiroshi Mizowaki ◽  
Masahiro Hirata ◽  
Daisuke Okai ◽  
Hidetaka Nakanishi
Keyword(s):  
Dislocation Density ◽  
Tensile Deformation ◽  
Density Change ◽  
Coarse Grained

scholarly journals Measurement of dislocation density change during tensile deformation in coarse-grained aluminum by In-situ XRD technique with tester oscillation

2020 ◽  
Vol 70 (7) ◽  
pp. 274-280
Author(s):  
Hiroki Adachi ◽  
Hiroshi Mizowaki ◽  
Masahiro Hirata ◽  
Daisuke Okai ◽  
Hidetaka Nakanishi
Keyword(s):  
Dislocation Density ◽  
Tensile Deformation ◽  
Density Change ◽  
Coarse Grained ◽  
In Situ Xrd

Variant selection of {10-12}-{10-12} double twins during the tensile deformation of an AZ31 Mg alloy

2017 ◽  
Vol 700 ◽  
pp. 226-233 ◽  
Author(s):  
Renlong Xin ◽  
Changfa Guo ◽  
John J. Jonas ◽  
Gang Chen ◽  
Qing Liu
Keyword(s):  
Tensile Deformation ◽  
Mg Alloy ◽  
Variant Selection ◽  
Az31 Mg Alloy ◽  
Selection Of

Dislocation Density Changes in Ultrafine-Grain Aluminum during Tensile Deformation

2012 ◽  
pp. 61-66 ◽  
Author(s):  
Hiroki Adachi ◽  
Yoji Miyajima ◽  
Akinobu Shibata ◽  
Daisuke Terada ◽  
Nobuhiro Tsuji
Keyword(s):  
Dislocation Density ◽  
Tensile Deformation ◽  
Ultrafine Grain

Unusual Plastic Deformation Behavior in Lath Martensitic Steel Containing High Dislocation Density

2017 ◽  
Vol 905 ◽  
pp. 46-51
Author(s):  
Stefanus Harjo ◽  
Takuro Kawasaki ◽  
Yo Tomota ◽  
Wu Gong
Keyword(s):  
Plastic Deformation ◽  
Dislocation Density ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Lath Martensite ◽  
Strengthening Mechanism ◽  
High Dislocation Density ◽  
Random Arrangement ◽  
Plastic Deformation Behavior ◽  
In Situ Neutron Diffraction

To understand the strengthening mechanism of a metallic material with high dislocation density, the plastic deformation behavior of lath martensite was studied by means of in situ neutron diffraction measurements during tensile deformations using a 22SiMn2TiB steel and a Fe-18Ni alloy. The characteristics of dislocation were analyzed and were discussed with the relation of stress-strain curves. The dislocation densities (ρ) induced by martensitic transformation during heat-treatment in both materials were found to be originally as high as 1015 m-2 order, and subsequently to increase slightly by the tensile deformation. The parameter M value which displays the dislocation arrangement dropped drastically at the beginning of plastic deformation in both materials, indicating that the random arrangement became more like a dipole arrangement.

Density change in iron after tensile deformation

1970 ◽  
Vol 2 (1) ◽  
pp. 91-99 ◽  
Author(s):  
A. Loyer ◽  
J.-M. Dorlot
Keyword(s):  
Tensile Deformation ◽  
Density Change

scholarly journals In situ synchrotron X-ray diffraction line-profile analysis of additively manufactured Ti−6Al−4V alloy under tensile deformation

2020 ◽  
Vol 321 ◽  
pp. 03026
Author(s):  
K. Yamanaka ◽  
A. Kuroda ◽  
M. Ito ◽  
M. Mori ◽  
T. Shobu ◽  
...  
Keyword(s):  
Dislocation Density ◽  
Line Profile ◽  
Tensile Deformation ◽  
Profile Analysis ◽  
High Energy ◽  
Line Profile Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Β Phase

In this study, the tensile deformation behavior of an electron beam melted Ti−6Al−4V alloy was examined by in situ X-ray diffraction (XRD) line-profile analysis. The as-built Ti−6Al−4V alloy specimen showed a fine acicular microstructure that was produced through the decomposition of the α′-martensite during the post-melt exposure to high temperatures. Using high-energy synchrotron radiation, XRD line-profile analysis was successfully applied for examining the evolution of dislocation structures not only in the α-matrix but also in the nanosized, low-fraction β-phase precipitates located at the interfaces between the α-laths. The results indicated that the dislocation density was initially higher in the β-phase and an increased dislocation density with increasing applied tensile strain was quantitatively captured in each constitutive phase. It can be thus concluded that the EBM Ti−6Al−4V alloy undergoes a cooperative plastic deformation between the constituent phases in the duplex microstructure. These results also suggested that XRD line-profile analysis combined with highenergy synchrotron XRD measurements can be utilized as a powerful tool for characterizing duplex microstructures in titanium alloys.

Tensile Deformation Behaviors of Ultra-Fine Subgrained Aluminum

2011 ◽  
Vol 683 ◽  
pp. 189-192
Author(s):  
Xiao Jing Xu ◽  
Cheng Cheng ◽  
Yong Luo ◽  
Tao Song ◽  
Zhen Dan Fei
Keyword(s):  
Dislocation Density ◽  
Plastic Strain ◽  
Theoretical Calculation ◽  
Strain Hardening ◽  
High Strain ◽  
Tensile Deformation ◽  
Peak Stress ◽  
Low Dislocation Density ◽  
Deformation Behaviors ◽  
Dislocation Density Increase

Tensile deformation behaviors up to peak stress of the ultra-fine subgrained aluminum (2024Al) with the subgrain sizes of about 250 nm and low dislocation density inside were investigated. The results show that the ultra-fine subgrained aluminum exhibited high strain hardening and large uniform plastic strain (19.3 %), but little post-deformation hardness/dislocation density increases (99.6 HV vs. 100.3 HV and 0.79×1014 m-2 vs. 1.03×1014 m-2, respectively). The theoretical calculation based on Taylor equation demonstrated that the dislocation density increase during the tensile deformation up to peak stress was very enormous (1.64×1015 m-2). These results not only implied that the dislocations involved in the tensile deformation were in large quantities but most of them disappeared upon the unloading of the tensile deformation, but also demonstrated that high strain hardening capacity is not a sufficient factor for ultra-fine subgrained metals to store deformation dislocations leading to post-deformation hardness increases.

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