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

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.

Strain hardening behavior of a friction stir welded magnesium alloy

2007 ◽  
Vol 57 (11) ◽  
pp. 1004-1007 ◽  
Author(s):  
N. Afrin ◽  
D.L. Chen ◽  
X. Cao ◽  
M. Jahazi
Keyword(s):  
Magnesium Alloy ◽  
Strain Hardening ◽  
Friction Stir ◽  
Hardening Behavior ◽  
Strain Hardening Behavior

The Orientation Dependence of Strain Hardening and Texture Development in an Extruded Magnesium Alloy

2014 ◽  
Vol 783-786 ◽  
pp. 363-368 ◽  
Author(s):  
D. Sarker ◽  
Dao Lun Chen
Keyword(s):  
Magnesium Alloy ◽  
Strain Hardening ◽  
Texture Evolution ◽  
Extrusion Direction ◽  
Orientation Dependence ◽  
Mechanical Anisotropy ◽  
Hardening Behavior ◽  
Compression Direction ◽  
Texture Change ◽  
Strain Hardening Behavior

Extruded magnesium alloys showed mechanical anisotropy due to the development of strong crystallographic textures during forming processes. In the present study the strain hardening behavior and texture evolution of an extruded AM30 magnesium alloy were studied in compression using cylindrical samples oriented at angles of 0°, 15°, 30°, 45° and 90° from the extrusion direction (ED). The yield strength decreased with increasing angle up to 45° and then increased at 90° from the ED, while the ultimate compressive strength exhibited a reverse trend. Both hardening capacity and fracture strain first increased from 0° to 45° and then decreased at 90° from the ED. The strain hardening behavior was directly related to the texture change and twinning, which played a key role in accommodating the compressive deformation, as the c-axes in most grains were observed to rotate always towards the anti-compression direction, irrespective of the sample orientation.

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.

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