Flow Stress Behavior and Microstructure Evolution of Austenitic Stainless Steel with Low Copper Content during Hot Compression Deformation

In order to study the microstructure evolution and flow stress behavior of as cast antibacterial austenitic stainless steel containing 1.52 wt.% copper, Gleeble 3800 was used for thermal compression simulation test. Through OM and EBSD analysis, it is found that the dynamic recrystallization mechanism of thermal deformation is mainly discontinuous dynamic recrystallization. With the increase of deformation temperature and deformation rate, the proportion of recrystallization nucleation gradually increases. The growth of twins relies on recrystallization and, at the same time, promotes dynamic recrystallization. Considering the influence of strain on flow stress, the strain compensation Arrhenius model is established according to the obtained stress-strain curve, and high accuracy is obtained. The correlation coefficient and average relative absolute error are 0.979 and 7.066% respectively. These results provide basic guidance for the technology of microstructure control and excellent mechanical properties of antibacterial stainless steel.

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Flow Stress Behavior of Nanometric Al2O3 Particulate Reinforced Al Alloy Composites Manufactured by Casting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.430-432.1294 ◽

2012 ◽

Vol 430-432 ◽

pp. 1294-1297

Author(s):

Zhi Min Zhang ◽

Yong Biao Yang ◽

Xing Zhang

Keyword(s):

Grain Size ◽

Flow Stress ◽

Dynamic Recrystallization ◽

Al Alloy ◽

Strain Rates ◽

Stress Behavior ◽

Flow Stress Behavior ◽

Increasing Temperature ◽

Particulate Reinforced ◽

Temperature Dynamic

The flow stress behavior of nanometric Al2O3 particulate reinforced Al alloy composites were investigated using thermal simulation machine Gleeble-1500. Microsturctural analysis were carried out on optical microscopy. The results showed that the flow stress increased with increasing strain rate and decreased with decreasing temperature. Dynamic recovery and dynamic recrystallization occurred during hot compression of the Al composites. The grain size increased with increasing temperature (590k-710k) and decreased at 750k due to dynamic recrystallization. The grain size decreased with increasing strain rates at 750k.

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A constitutive model for the flow stress behavior and microstructure evolution in aluminum alloys under hot working conditions – with application to AA6099

Applied Mathematical Modelling ◽

10.1016/j.apm.2019.12.020 ◽

2020 ◽

Vol 81 ◽

pp. 253-262

Author(s):

Håkan Hallberg ◽

Ahmad Chamanfar ◽

Nicholas E. Nanninga

Keyword(s):

Flow Stress ◽

Aluminum Alloys ◽

Constitutive Model ◽

Working Conditions ◽

Microstructure Evolution ◽

Hot Working ◽

Stress Behavior ◽

Flow Stress Behavior

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Flow stress behavior of high-purity Al-Cu-Mg alloy and microstructure evolution

Journal of Central South University ◽

10.1007/s11771-015-2587-6 ◽

2015 ◽

Vol 22 (3) ◽

pp. 815-820 ◽

Cited By ~ 5

Author(s):

Li Li ◽

Hui-zhong Li ◽

Xiao-peng Liang ◽

Lan Huang ◽

Tao Hong

Keyword(s):

Flow Stress ◽

Microstructure Evolution ◽

High Purity ◽

Mg Alloy ◽

Stress Behavior ◽

Flow Stress Behavior

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Flow Stress Behavior of 2205 Duplex Stainless Steel during Warm Tensile

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.1605 ◽

2012 ◽

Vol 538-541 ◽

pp. 1605-1610 ◽

Cited By ~ 1

Author(s):

Ji Xiang Zhang ◽

Zheng Jun Li ◽

Guo Yin An ◽

Zhi Xiang Wang

Keyword(s):

Stainless Steel ◽

Flow Stress ◽

Constitutive Equation ◽

Strain Rate ◽

Duplex Stainless Steel ◽

Flow Behavior ◽

Testing Machine ◽

2205 Duplex Stainless Steel ◽

Stress Behavior ◽

Flow Stress Behavior

The flow behavior of 2205 duplex stainless steel for ship sheet in the strain rate ranging from 0.001 s-1 to 0.1s-1 and temperature ranging from 473K to 1073 K is studied on AG-10TA universal material testing machine. The results show that the 2205 duplex stainless steel is a strain rate sensitive material, and the flow stress increases with the increase of strain rate and decreases with the increase of temperature. The average elongation of the 2205 duplex stainless steel is above 25% with the temperature ranging from 473K-873K, and the elongation is above 47% at 1073K; At last, the flow stress constitutive equation is established based on the Browman model, which describes the flow stress behavior of 2205 duplex stainless steel in the temperature ranging from 473K-873K. The curves predicted by the constitutive equation agreement with the experiment data well.

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Effects of strain rate on flow stress behavior and dynamic recrystallization mechanism of Al-Zn-Mg-Cu aluminum alloy during hot deformation

Materials Science and Engineering A ◽

10.1016/j.msea.2016.03.027 ◽

2016 ◽

Vol 662 ◽

pp. 204-213 ◽

Cited By ~ 53

Author(s):

Qunying Yang ◽

Zanhui Deng ◽

Zhiqing Zhang ◽

Qing Liu ◽

Zhihong Jia ◽

...

Keyword(s):

Aluminum Alloy ◽

Flow Stress ◽

Dynamic Recrystallization ◽

Strain Rate ◽

Hot Deformation ◽

Recrystallization Mechanism ◽

Stress Behavior ◽

Flow Stress Behavior

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Recrystalization Behavior of Coldworked 14Cr-15Ni-2Mo Austenitic Stainless Steel Under Tensile Deformation

High Temperature Materials and Processes ◽

10.1515/htmp-2012-0154 ◽

2013 ◽

Vol 32 (4) ◽

pp. 413-420 ◽

Cited By ~ 2

Author(s):

M. Nandagopal ◽

P. Parameswaran ◽

V.D. Vijayanand ◽

S. Panneerselvi ◽

K. Laha ◽

...

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Dynamic Recrystallization ◽

Tensile Deformation ◽

Strain Curve ◽

Tensile Tests ◽

Vacuum Arc ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Alloy D9

AbstractRecrystallization behavior of 20% coldworked alloy D9 (14Cr-15Ni-2Mo austenitic stainless steel) during high temperature tensile deformation has been assessed. The alloy was produced by vacuum induction melting followed either by vacuum arc refining (VAR) or electroslag refining (ESR). Tensile studies were carried out at various temperatures between ambient and 1073 K at an interval of 50 K and at strain rate of 1.2 × 10−3 s−1. The peak in the stress-strain curve was observed for the tensile tests conducted at 973–1073 K. This is attributed to dynamic recrystallization during tensile deformation. The values of the apparent activation energy were estimated as 384 kJ/mol for ESR grade alloy D9 and 372 kJ/mol for VAR grade alloy D9 by hyperbolic-sine Arrhenius equation, which agree well with that required for dynamic recrystallization in stainless steels. TEM studies confirmed extensive recovery and dynamic recrystalization in both the alloys.

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