Microstructural evolution and flow behaviour during hot compression of twin roll cast ZK60 magnesium alloy

Microstructural evolution and flow behavior of twin-roll cast AZ41 magnesium alloy during hot compression were characterized by employing deformation temperature of 300°C, 350°C and 400°C, and strain rate ranging from 10-3 to 10-2 s -1. When compressed at different temperature (300°C, 350°C and 400°C) and strain rate (10-3 and 10-2 s -1) all stress strain curves showed a flow softening behavior before strained to 0.51 due to dynamic recrystallization, even though concurrent twinning was quite active. Twinning contributed to the flow hardening behavior appeared during the end of hot compression (ε > 0.51) at a strain rate of 10-2 s -1 and elevated temperature (300°C, 350°C and 400°C) in spite of the softening effect of concurrently occurred dynamic recrystallization. TEM image showed that discontinuous recrystallization occurred when deformed at elevated temperature as high as 400°C and the strain rate ranging from 10-2 to 10-3 s -1. It is suggested that dislocation slip, twinning and recrystallization develop in a cyclic mode from initial stage to the end of hot compression.

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Enhanced plasticity of twin-roll cast ZK60 magnesium alloy through differential speed rolling

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2009.03.040 ◽

2009 ◽

Vol 30 (9) ◽

pp. 3345-3350 ◽

Cited By ~ 67

Author(s):

Xibing Gong ◽

Suk Bong Kang ◽

Saiyi Li ◽

Jae Hyung Cho

Keyword(s):

Magnesium Alloy ◽

Differential Speed Rolling ◽

Twin Roll Cast ◽

Zk60 Magnesium Alloy ◽

Twin Roll ◽

Differential Speed

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Effect of annealing on microstructure and mechanical properties of ZK60 magnesium alloy sheets processed by twin-roll cast and differential speed rolling

Materials Characterization ◽

10.1016/j.matchar.2014.09.014 ◽

2014 ◽

Vol 97 ◽

pp. 183-188 ◽

Cited By ~ 16

Author(s):

Xibing Gong ◽

Suk Bong Kang ◽

Jae Hyung Cho ◽

Saiyi Li

Keyword(s):

Mechanical Properties ◽

Magnesium Alloy ◽

Microstructure And Mechanical Properties ◽

Differential Speed Rolling ◽

Twin Roll Cast ◽

Zk60 Magnesium Alloy ◽

Twin Roll ◽

Differential Speed

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Effect of rolling temperature on microstructure and texture of twin roll cast ZK60 magnesium alloy

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(09)60422-2 ◽

2010 ◽

Vol 20 (11) ◽

pp. 2086-2091 ◽

Cited By ~ 8

Author(s):

Hong-mei CHEN ◽

Hua-shun YU ◽

Suk-bong KANG ◽

Guang-hui MIN ◽

Yun-xue JIN

Keyword(s):

Magnesium Alloy ◽

Rolling Temperature ◽

Twin Roll Cast ◽

Zk60 Magnesium Alloy ◽

Twin Roll

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STRESS DROP LED BY TWINNING DURING INITIAL STAGE OF HOT COMPRESSION OF TWIN-ROLL CAST Mg–5.51%Zn–0.49%Zr ALLOY

International Journal of Modern Physics B ◽

10.1142/s0217979212501822 ◽

2012 ◽

Vol 26 (32) ◽

pp. 1250182

Author(s):

ZHIYI LIU ◽

JING XU ◽

YANHUI HOU ◽

SUKBONG KANG

Keyword(s):

Flow Stress ◽

Dynamic Recrystallization ◽

Stress Drop ◽

Deformation Temperature ◽

Hot Compression ◽

Initial Stage ◽

Twin Roll Cast ◽

Zk60 Magnesium Alloy ◽

Twin Roll ◽

Zr Alloy

Flow stress behavior during initial stage of hot compression of twin-roll cast ZK60 magnesium alloy was characterized by employing deformation temperature of 300°C and 400°C, and a given strain rate of 10-2 s -1. A stress drop during initial stage of hot compression at 300°C, generally led by dynamic recrystallization, was found to be attributed to twinning, correspondingly to dynamic recrystallization as deformation temperature was raised to 400°C.

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