Effect of Heat Treatment on Microstructure and Mechanical Properties in ZK60 Alloy Sheet

The sheet of ZK60 alloy with a thickness of 1mm was prepared from a casting ingot followed by homogenization and warm-rolling. Variations in microstructure and mechanical properties of ZK60 alloy sheets were investigated during T6 treatment. Especially artificial aging after solution heat treatment affected both precipitates distribution and mechanical properties with aging treatment. Variations of mechanical properties were related to precipitates, i.e. rod-shaped ( 1 β ′ ) or disc shaped ( 2 β ′ ) particles. Around the peak of hardness values, regularly distributed rod-shaped ( 1 β ′ ) precipitates were found. The rod-shaped ( 1 β ′ ) precipitates were oriented with a growth direction of [0001]. When over-aged, rod-shaped ( 1 β ′ ) precipitates were expected to decrease and the density of disc-shaped ( 2 β ′ ) precipitates to change. The rod-shaped ( 1 β ′ ) precipitates mainly consist of {Mg, Zn}, while disc-shaped ( 2 β ′ ) precipitates, {Mg, Zn, Zr} or {Mg, Zn}. In this study the optimum T6 treatment was determined as solution treatment at 430 °C for 6 hours and subsequently aging treatment at 175 °C for 18 hours. At this T6 condition the tensile strength, yield strength and elongation are 321MPa, 280MPa and 16%, respectively.

Download Full-text

The Effect of Heat Treatment on Microstructure and Mechanical Properties of ZK60 Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.353-358.718 ◽

2007 ◽

Vol 353-358 ◽

pp. 718-721

Author(s):

Ding Fei Zhang ◽

Rong Shen Liu ◽

Jian Peng ◽

Wei Yuang ◽

Hong Ju Zhang

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Solid Solution ◽

Age Hardening ◽

Second Phase ◽

Solid Solution Strengthening ◽

Microstructure And Mechanical Properties ◽

Long Time ◽

Zk60 Alloy ◽

Solution Strengthening

With different heat treatment, the microstructure and mechanical properties of ZK60 magnesium alloy were investigated. It can be concluded that heat treatment has great effect on mechanical properties of ZK60. With artificial aging after extruding, the precipitation of the second phase from the supersaturated solid solution significantly improved mechanical properties. It can greatly increase yield strength of ZK60 alloy, while the tensile strength has little change. For the combination of solid solution strengthening and age hardening, two opposite factors must be considered. On one hand, the solid solution strengthening and the later precipitation strengthening is good for alloy’s strength; on the other hand, the properties decrease as the grains grew under high temperature for a long time during solution heating.

Download Full-text

Effect of Heat Treatment on Microstructure and Mechanical Properties of MA2-1 Alloy Sheet

Materials Science Forum ◽

10.4028/www.scientific.net/msf.488-489.151 ◽

2005 ◽

Vol 488-489 ◽

pp. 151-154

Author(s):

Weichao Zheng ◽

Xiao Li Sun ◽

Peijie Li ◽

Daben Zeng ◽

L.B. Ber

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Solid Solution ◽

High Purity ◽

Solution Treatment ◽

Optical Microscope ◽

Alloy Sheet ◽

Β Phase ◽

Microstructure And Mechanical Properties ◽

Mg17al12 Phase

Effect of heat treatment on the microstructure and mechanical properties of high purity MA2-1(Mg-5wt.%Al-1wt.%Zn-0.4wt.%Mn) alloy sheet were investigated. X-ray diffraction analysis indicated that the microstructure of high purity MA2-1 alloy sheet annealed consisted of α-Mg solid solution, β (Mg17Al12) phase and Al-Mn phases such as Al6Mn and Al10Mn3. β phase dissolved into α-Mg solid solution during the solution treatment and formed supersaturated α-Mg solid solution. After aging at the temperatures of 423 K, 473 K and 523 K for 12 hours, β phase precipitated from the supersaturated α-Mg solid solution. Optical microscope observation found that the grain size of the MA2-1 alloy sheet became larger after heat treatment. As a result, the mechanical properties of the MA2-1 alloy sheet such as the tensile strength and yield strength declined after the heat treatment.

Download Full-text

Effect of Forming Process on Microstructure and Mechanical Properties of ZK60 Alloy Sheet

Rare Metal Materials and Engineering ◽

10.1016/s1875-5372(12)60004-6 ◽

2011 ◽

Vol 40 (10) ◽

pp. 1708-1712 ◽

Cited By ~ 6

Author(s):

Chen Hongmei ◽

Yu Huashun ◽

Kang Suk Bong ◽

Min Guanghui ◽

Jin Yunxue

Keyword(s):

Mechanical Properties ◽

Alloy Sheet ◽

Forming Process ◽

Microstructure And Mechanical Properties ◽

Zk60 Alloy

Download Full-text

Microstructure and Mechanical Properties of ZK60 Alloy Sheets during Aging

Materials Science Forum ◽

10.4028/www.scientific.net/msf.558-559.159 ◽

2007 ◽

Vol 558-559 ◽

pp. 159-164 ◽

Cited By ~ 11

Author(s):

Jae Hyung Cho ◽

Y.M Jin ◽

Hyoung Wook Kim ◽

Suk Bong Kang

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Aging Time ◽

Solution Heat Treatment ◽

Aging Process ◽

Artificial Aging ◽

Warm Rolling ◽

Microstructure And Mechanical Properties ◽

Zk60 Alloy

Variations in microstructure and mechanical properties of ZK60 alloy sheets were investigated with aging time. ZK60 alloy sheets with a thickness of 1mm were prepared from a casting ingot followed by homogenization and warm-rolling. Artificial aging process after solution heat treatment (T6) affected both hardness variations and precipitates distributions with aging time. Hardness variations were related to precipitates, i.e. rod-shaped ( 1 β ′ ) or disc shaped ( 2 β ′ ) particles. Rod-shaped ( 1 β ′ ) precipitates mainly consist of Mg and Zn without Zr.

Download Full-text

Effect of High Density Electropulsing Current on Microstructure and Mechanical Properties of Fe-6.5wt.%Si Alloy Sheet

Materials Science Forum ◽

10.4028/www.scientific.net/msf.898.1236 ◽

2017 ◽

Vol 898 ◽

pp. 1236-1241 ◽

Cited By ~ 1

Author(s):

Y.Y. Liu ◽

Y.F. Liang ◽

S.B. Wen ◽

Feng Ye ◽

J.P. Lin

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Rolling Process ◽

High Energy ◽

Alloy Sheet ◽

High Density ◽

Rolled Sheet ◽

Microstructure And Mechanical Properties ◽

Conventional Heat Treatment ◽

Hot Rolled

Fe-6.5wt.%Si alloy is an excellent soft magnetic material. Due to the appearance of ordering structures, the alloy shows poor ambient temperature ductility, and can only be cold rolled by specific rolling process. The rolling process with heat treatment is complex and time consuming. Meanwhile, high-energy electropulsing shows electroplastic effect. Heat treatment effect of the high-density electropulsing on microstructure and mechanical properties were investigated. The hot rolled sheet with 1 mm in thickness could be uniformly recrystallized in 33 s at 690 oC by appropriate high density pulses and the ductility was improved in comparison to the conventional heat treatment in a furnace. After the electropulsing treatment, the hot rolled sheet could be warm rolled by 50% reduction of the thickness after one pass without edge crack.

Download Full-text