scholarly journals Effect of Grain Size on the Microstructure and Strain Hardening Behavior of Solution Heat-Treated Low-C High-Mn Steel

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1489 ◽  
Author(s):  
Marek Opiela ◽  
Gabriela Fojt-Dymara ◽  
Adam Grajcar ◽  
Wojciech Borek
Keyword(s):  
Grain Size ◽  
Strain Hardening ◽  
Strengthening Mechanism ◽  
Strength Properties ◽  
Low Carbon ◽  
Premature Failure ◽  
Hardening Behavior ◽  
Heat Treated ◽  
Strain Hardening Behavior ◽  
Grain Diameter

The low-carbon high-Mn austenitic steel microalloyed with titanium was investigated in this work. The steel was solution heat-treated at different temperatures in a range from 900 to 1200 °C. The aim was to receive a different grain size before the static tensile test performed at room temperature. The samples of different grain sizes showed the different strain hardening behavior and resulting mechanical properties. The size of grain diameter below 19 μm was stable up to 1000 °C. Above this temperature, the very enhanced grain growth took place with the grain diameter higher than 220 μm at 1200 °C. This huge grain size at the highest temperature resulted in the premature failure of the sample showing the lowest strength properties at the same time. Correlations between the grain size, the major strengthening mechanism, and fracture behavior were addressed. The relationships were assessed based on microstructural investigations and fractography tests performed for the deformed samples. The best combination of strength and ductility was found for the samples treated at 1000–1100 °C.

The Effect of Grain Size on the Strain Hardening Behavior for Extruded ZK61 Magnesium Alloy

2017 ◽  
Vol 26 (12) ◽  
pp. 6013-6021 ◽  
Author(s):  
Lixin Zhang ◽  
Wencong Zhang ◽  
Wenzhen Chen ◽  
Junpeng Duan ◽  
Wenke Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Magnesium Alloy ◽  
Strain Hardening ◽  
Hardening Behavior ◽  
Strain Hardening Behavior

Influence of Precipitation and Dislocation Density on Flow Stress Characteristics Under Compression Deformation of Heat-Treated 17-4 PH Stainless Steel Alloy

2019 ◽  
Author(s):  
Athul Sathyanath ◽  
Anil Meena
Keyword(s):  
Stainless Steel ◽  
Flow Stress ◽  
Dislocation Density ◽  
Strain Hardening ◽  
Steel Alloy ◽  
Hardening Behavior ◽  
Compression Deformation ◽  
Heat Treated ◽  
Strain Hardening Behavior ◽  
The Impact

Abstract The strengthening mechanism of 17-4 PH stainless steel is mainly due to the precipitation of copper particles in the martensitic lath matrix. The renowned steel grade possesses an exceptional combination of high strength and excellent corrosion resistance and hence is widely employed in high stress environments. In that case, under external loading, the movement and accumulation of dislocations are influenced by the nature of precipitation. Hence, the present study is based on the impact of precipitation on the dislocation induced hardening during compression of the heat-treated 17-4 PH stainless steel. Room temperature uniaxial compression test was used to evaluate the direct effect of precipitates and the dislocation interaction on the flow stress and strain-hardening behavior under the different heat-treated regime. Microstructural evolution during deformation and its influence on the strain-hardening mechanism were analyzed by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). A semi-empirical model was adopted to quantify the role of precipitate nature on the strain-hardening rate. The evaluated normalized microstrain and dislocation density from the XRD analyses were used to explain the observed variation in the mechanical property. Coarse particle precipitation was found to greatly affect the strain-hardening behavior of the steel alloy during compression deformation.

MECHANICAL PROPERTIES OF A PVA FIBER REINFORCED ENGINEERED CEMENTITIOUS COMPOSITE

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Ting Huang ◽  
Y.X. Zhang
Keyword(s):  
Grain Size ◽  
Strain Hardening ◽  
Tensile Strain ◽  
Construction Materials ◽  
Cementitious Composite ◽  
Fiber Reinforced ◽  
Engineered Cementitious Composite ◽  
Hardening Behavior ◽  
Dog Bone ◽  
Strain Hardening Behavior

High Performance Fiber Reinforced Cementitious Composites (HPFRCCs) are promising construction materials characterized by tensile strain hardening behavior. Engineered Cementitious Composite (ECC) is a special type of HPFRCC developed with enhanced ductility and durability. Coarse aggregates are usually excluded from the ECC matrix, and the reported ECCs are typically produced with microsilica sand having a maximum grain size of 200 µm. In this paper, a PVA-ECC mixture containing local dune sand with a maximum grain size of 300 µm was developed, and its compressive and tensile properties were experimentally investigated. A dog-bone-shaped specimen and a rectangular-coupon-shaped specimen were both used in the tensile test, and it was found after extensive research that the dog-bone specimen was more suitable than the rectangular coupon specimen. The experimental results from the dog-bone specimens indicated that the newly-developed composite possessed good tensile strain-hardening behavior, with a high ultimate tensile strength, and the compressive strength was comparable to that of existing PVA-ECCs.

Sign in / Sign up

Export Citation Format

Share Document