Microstructure evolutions and nucleation mechanisms of dynamic recrystallization of a powder metallurgy Ni-based superalloy during hot compression

2016 ◽  
Vol 677 ◽  
pp. 496-504 ◽  
Author(s):  
Guoai He ◽  
Feng Liu ◽  
Lan Huang ◽  
Zaiwang Huang ◽  
Liang Jiang
Keyword(s):  
Powder Metallurgy ◽  
Dynamic Recrystallization ◽  
Hot Compression ◽  
Nucleation Mechanisms

Nucleation mechanisms of dynamic recrystallization for G3 alloy during hot compression

Rare Metals ◽  
2016 ◽  
Vol 35 (7) ◽  
pp. 543-550 ◽  
Author(s):  
Jue Wang ◽  
Jian-Xin Dong ◽  
Mai-Cang Zhang
Keyword(s):  
Dynamic Recrystallization ◽  
Hot Compression ◽  
Nucleation Mechanisms

Effect of Sm on dynamic recrystallization of Mg-8Gd-0.5Zr alloy during hot compression

2021 ◽  
Vol 865 ◽  
pp. 158648
Author(s):  
Limin Zhu ◽  
Quanan Li ◽  
Xiaoya Chen ◽  
Qing Zhang
Keyword(s):  
Dynamic Recrystallization ◽  
Hot Compression

scholarly journals Hot Compression Behavior of New Al-6Mg and Al-8Mg Alloy with Improved Hot Workability Fabricated by Direct Chill Casting Method

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 288
Author(s):  
Nam-Seok Kim ◽  
Kweon-Hoon Choi ◽  
Seung-Yoon Yang ◽  
Seong-Ho Ha ◽  
Young-Ok Yoon ◽  
...  
Keyword(s):  
Dynamic Recrystallization ◽  
Compression Test ◽  
Deformation Behavior ◽  
Hot Compression ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Strength Increase ◽  
Peak Strain ◽  
Hot Workability ◽  
Hot Compression Test

A hot compression test of new Al-6Mg and Al-8Mg alloys was conducted to understand the dynamic recrystallization (DRX) behavior by Mg contents. To investigate the hot workability of Al-Mg with high Mg contents, the hot deformation behavior of Al-6Mg and Al-8Mg alloys was analyzed by a hot compression test in the temperature range of 300–450 °C, and the strain rate range of 10−3–100/s. Subsequently, high-temperature deformation behavior was investigated through the processing map and microstructure observation. In this study, the results have shown that, as the Mg contents increase, the maximum and yield strength increase while rapid flow softening after the peak strain has been observed due to accelerated dynamic recrystallization (DRX). Finally, the increase of Mg contents affects an increase of heat dissipation efficiency to be an indicator of regular deformation.

scholarly journals Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1743 ◽  
Author(s):  
Lei Luo ◽  
Zhiyi Liu ◽  
Song Bai ◽  
Juangang Zhao ◽  
Diping Zeng ◽  
...  
Keyword(s):  
Dynamic Recrystallization ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Processing Parameters ◽  
Strain Rate Range ◽  
Hot Compression ◽  
Processing Maps ◽  
Hot Deformation Behavior ◽  
Recrystallization Mechanism ◽  
Cu Alloy

The hot deformation behavior of an Al-Zn-Mg-Cu alloy was investigated by hot compression test at deformation temperatures varying from 320 to 440 °C with strain rates ranging from 0.01 to 10 s−1. The results show that the Mg(Zn, Cu)2 particles as a result of the sufficient static precipitation prior to hot compression have an influence on flow softening. A constitutive model compensated with strain was developed from the experimental results, and it proved to be accurate for predicting the hot deformation behavior. Processing maps at various strains were established. The microstructural evolution demonstrates that the dominant dynamic softening mechanism stems from dynamic recovery (DRV) and partial dynamic recrystallization (DRX). The recrystallization mechanism is continuous dynamic recrystallization (CDRX). The microstructure observations are in good agreement with the results of processing maps. On account of the processing map and microstructural observation, the optimal hot processing parameters at a strain of 0.6 are at deformation temperature range of 390–440 °C and strain rate range of 0.010–0.316 s−1 with a peak efficiency of 0.390.

scholarly journals Dynamic Recrystallization Behavior and Processing Map of the 6082 Aluminum Alloy

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1042 ◽  
Author(s):  
Dao-chun Hu ◽  
Lei Wang ◽  
Hong-jun Wang
Keyword(s):  
Dynamic Recrystallization ◽  
Critical Strain ◽  
High Efficiency ◽  
Processing Map ◽  
Testing Machine ◽  
Hot Compression ◽  
Hot Working ◽  
Al Alloy ◽  
Strain Rates ◽  
6082 Al Alloy

Multiple hot-compression tests were carried out on the 6082 aluminum (Al) alloy using a Gleeble-1500 thermal simulation testing machine. Data on flow stresses of the 6082 Al alloy at deformation temperatures of 623 to 773 K and strain rates from 0.01 to 5 s−1 were attained. Utilizing electron backscatter diffraction (EBSD) and a transmission electron microscope (TEM), the dynamic recrystallization behaviors of the 6082 Al alloy during hot compression in isothermal conditions were explored. With the test data, a hot-working processing map for the 6082 Al alloy (based on dynamic material modeling (DMM)) was drawn. Using the work-hardening rate, the initial critical strain causing dynamic recrystallization was determined, and an equation for the critical strain was constructed. A dynamic model for the dynamic recrystallization of the 6082 Al alloy was established using analyses and test results from the EBSD. The results showed that the safe processing zone (with a high efficiency of power dissipation) mainly corresponded to a zone with deformation temperatures of 703 to 763 K and strain rates of 0.1 to 0.3 s−1. The alloy was mainly subjected to continuous dynamic recrystallization in the formation of the zone. According to the hot-working processing map and an analysis of the microstructures, it is advised that the following technological parameters be selected for the 6082 Al alloy during hot-forming: a range of temperatures between 713 and 753 K and strain rates between 0.1 and 0.2 s−1.

Quantitative Analysis of Dynamic Softening Behaviors Induced by Dynamic Recrystallization for Ti-10V-2Fe-2Al Alloy

2015 ◽  
Vol 34 (6) ◽  
Author(s):  
Guozheng Quan ◽  
Shiao Pu ◽  
Hairong Wen ◽  
Zhenyu Zou ◽  
Jie Zhou
Keyword(s):  
Titanium Alloy ◽  
Quantitative Analysis ◽  
Dynamic Recrystallization ◽  
Hot Compression ◽  
Laboratory Scale ◽  
Compression Tests ◽  
Temperature Range ◽  
Height Reduction ◽  
Softening Behavior ◽  
Dynamic Softening

AbstractIn order to investigate the effect of dynamic recrystallization (DRX) behavior on dynamic softening behavior of wrought Ti-10V-2Fe-3Al titanium alloy, a series of laboratory scale isothermal hot compression tests with a height reduction of 60% were performed in a temperature range of 948 K~1023 K in the (

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