Dynamic aging of 18 wt-%Ni maraging 250 steel, based on studies of serrated flow

1985 ◽  
Vol 1 (4) ◽  
pp. 285-290 ◽  
Author(s):  
R. W. Hayes
Keyword(s):  
Serrated Flow ◽  
Dynamic Aging

Serrated flow in gold-indium alloys

1969 ◽  
Vol 20 (165) ◽  
pp. 495-509 ◽  
Author(s):  
A. J. R. Soler-gomez ◽  
W. J. Mcg. Tegart
Keyword(s):  
Serrated Flow ◽  
Indium Alloys

scholarly journals Excellent Ductility in the Extruded AZ61 Magnesium Alloy Tube Induced by Electropulsing Treatment during Tension

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 813
Author(s):  
Bo Jiang ◽  
Dongdong Zhang ◽  
Hong Xu ◽  
Yongbing Liu ◽  
Zhanyi Cao ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Thermal Effects ◽  
Average Amplitude ◽  
Serrated Flow ◽  
Flow Phenomenon ◽  
Az61 Magnesium Alloy ◽  
Alloy Tube ◽  
Electropulsing Treatment ◽  
Electron Wind

In this work, we reported the high ductility of an extruded AZ61 magnesium alloy tube achieved by electropulsing current-assisted tension. The elongation of the alloy reached up to about 45%, which is largely superior to the majority of AZ61 wrought Mg alloys. We found that the hardening capacity of the alloy seemed to slightly increase as the electropulsing frequency increased. Furthermore, electropulsing can arouse the serrated flow phenomenon. Here we proposed an equation describing the correlation between the average amplitude and frequency: Aa = C − 6 × 10−3f, where Aa is the average amplitude, f is the frequency, and C is the constant. In addition, introducing electropulsing current pronouncedly reduced the tendency of twinning, but the twinning fraction seemed to fail depending on the electropulsing frequency. Based on microstructure analysis, we concluded that the outstanding ductility of the studied alloy was mainly due to the combined role of the thermal effects from Joule heating, the athermal effects from electron wind, and the magnetic effects from the electropulsing current. The serrated flow phenomenon occurred along stress–strain curves after electropulsing treatment, and the underlying reasons also were uncovered.

The relationship between dynamic strain aging and serrated flow behaviour in magnesium alloy

2017 ◽  
Vol 97 (6) ◽  
pp. 235-240 ◽  
Author(s):  
W. H. Wang ◽  
D. Wu ◽  
S. S. Shah ◽  
J. H. Ni ◽  
R. S. Chen ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Flow Behaviour ◽  
Dynamic Strain ◽  
Serrated Flow ◽  
The Relationship

Improvement of Mechanical Properties and Corrosion Resistance by Deformation Induced Precipitation in Al-Zn-Mg-Cu Alloy

2017 ◽  
Vol 898 ◽  
pp. 179-190 ◽  
Author(s):  
Jin Rong Zuo ◽  
Long Gang Hou ◽  
Jin Tao Shi ◽  
Hua Cui ◽  
Lin Zhong Zhuang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Thermomechanical Treatment ◽  
High Strength ◽  
Alloy Sheet ◽  
Rolling Temperature ◽  
Al Alloy ◽  
Deformation Degree ◽  
Dynamic Aging ◽  
Final Rolling Temperature ◽  
Final Rolling

A final thermomechanical treatment (FTMT) including peak aging and subsequent dynamic aging was proposed to prepare 7055 Al alloy sheets. The optimization was based on nine well-planned orthogonal experiments. Three main processing conditions in the thermomechanical treatment for obtaining the optimum synthetic properties of 7055 (i.e. preheating temperature, final rolling temperature and deformation degree) were investigated. It was shown that the final rolling temperature is the most important factor among the three parameters, and the optimum properties (yield strength: 651 MPa, ultimate tensile strength: 660 MPa) of 7055 Al alloy sheet can be gained with preheating at 140oC and 40% deformation at 170oC. With dynamic aging, grain boundary precipitates became discontinuous without much coarsening of matrix precipitates, while they were continuously distributed after T6 aging. The present optimal FTMT process can improve the intergranular / exfoliation corrosion resistance without sacrificing the strength compared to T6 tempering. The present FTMT process as a good alternative can produce high-strength Al alloy sheets with high strength and good corrosion resistance efficiently and economically.

Peculiar serrated flow during compression of an FeAlCrMo medium-entropy alloy

2019 ◽  
Vol 161 ◽  
pp. 49-53 ◽  
Author(s):  
Michal Knapek ◽  
Josef Pešička ◽  
Pavel Lukáč ◽  
Peter Minárik ◽  
Robert Král
Keyword(s):  
Serrated Flow

A proposed model for the disappearance of serrated flow in two Fe alloys

1984 ◽  
Vol 32 (2) ◽  
pp. 259-267 ◽  
Author(s):  
R.W. Hayes ◽  
W.C. Hayes
Keyword(s):  
Serrated Flow ◽  
Proposed Model ◽  
Fe Alloys

A model of the mechanics of serrated flow in an amorphous alloy

1983 ◽  
Vol 31 (2) ◽  
pp. 231-240 ◽  
Author(s):  
H. Kimura ◽  
T. Masumoto
Keyword(s):  
Amorphous Alloy ◽  
Serrated Flow

Rate dependence of serrated flow in a metallic glass

2003 ◽  
Vol 18 (4) ◽  
pp. 755-757 ◽  
Author(s):  
W. H. Jiang ◽  
M. Atzmon
Keyword(s):  
Plastic Deformation ◽  
Atomic Force Microscopy ◽  
Loading Rate ◽  
Shear Bands ◽  
Shear Band Formation ◽  
Band Formation ◽  
Serrated Flow ◽  
Force Microscopy ◽  
Loading Rates ◽  
Atomic Force

Plastic deformation of amorphous Al90Fe5Gd5 was investigated using nanoindentation and atomic force microscopy. While serrated flow was detected only at high loading rates, shear bands were observed for all loading rates, ranging from 1 to 100 nm/s. However, the details of shear-band formation depend on the loading rate.

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