Direct preparation of semi-solid billets by the semi-solid isothermal heat treatment for commercial cold-rolled ZL104 aluminum alloy

2021 ◽  
Vol 28 (7) ◽  
pp. 1164-1173
Author(s):  
Yong-fei Wang ◽  
Yi Guo ◽  
Sheng-dun Zhao ◽  
Xiao-guang Fan
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Isothermal Heat Treatment ◽  
Direct Preparation ◽  
Cold Rolled ◽  
Semi Solid

scholarly journals Effect of Heat Treatment on Microstructure and Mechanical Properties of New Cold-Rolled Automotive Steels

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1414
Author(s):  
Fei Huang ◽  
Jian Chen ◽  
Zhangqi Ge ◽  
Junliang Li ◽  
Yongqiang Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Testing Machine ◽  
Second Phase ◽  
Isothermal Heat Treatment ◽  
Austenitizing Temperature ◽  
Austenite Grain Size ◽  
Austenite Grain ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled

The effect of austenitizing temperature and aging treatment on the microstructure and mechanical properties of two new cold-rolled automotive steel plates (20Mn2Cr and 20Mn2CrNb) was investigated by using isothermal heat treatment, optical microscope, scanning electron microscope, microhardness tester, and tensile testing machine. The results show that as the austenitizing temperature increased, the original austenite grain sizes of both steels increased. The original austenite grain size of 20Mn2CrNb was smaller than that of 20Mn2Cr. The microhardness of 20Mn2CrNb gradually decreased with increasing aging temperature, while the hardness of 20Mn2Cr varied irregularly. The mechanical properties of 20Mn2Cr were better than those of 20Mn2CrNb under the same heat-treatment process. The effect of heat treatment on microstructure and mechanical properties was related to the martensite content, dislocation density, and precipitation of second-phase particles.

Tensile Properties of Semi-Solid Die Cast AC4C Aluminum Alloy

2014 ◽  
Vol 680 ◽  
pp. 11-14
Author(s):  
Ke Ren Shi ◽  
Sirikul Wisutmethangoon ◽  
Jessada Wannasin ◽  
Thawatchai Plookphol
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Die Casting ◽  
Casting Process ◽  
Al Alloy ◽  
Die Cast ◽  
Die Casting Process ◽  
Semi Solid ◽  
Strength And Ductility

In this study, semi-solid Al-Mg-Si alloy (AC4C) was produced by using the Gas Induced Semi-Solid (GISS) die casting process. The tensile strength and ductility of the semi-solid die cast Al alloy (GISS-DC) after T6 heat treatment were investigated and compared with those of the conventional liquid die casting (CLDC). The microstructures of GISS-DC and CLDC observed by an optical microscopy were presented. The ultimate tensile strength (UTS) and yield strength (0.2% YS) of GISS-DC are compatible with those of the CLDC. However, the GISS-DC has better ductility than the CLDC, this may be due to the smaller and more globular primary α-Al phase and rounder shaped-Si particle microstructures presented in the GISS-DC. Common shrinkage pores and defects were also observed by SEM from the fracture surfaces of both alloys.

Effects of SiC Particle and Holding Time on Semi-Solid Microstructure of SiCP/AZ61 Composites

2010 ◽  
Vol 152-153 ◽  
pp. 628-633
Author(s):  
Fa Yun Zhang ◽  
Jian Xiong Ye ◽  
Hong Yan
Keyword(s):  
Heat Treatment ◽  
Microstructure Evolution ◽  
Volume Fraction ◽  
Particle Volume Fraction ◽  
Isothermal Holding ◽  
Holding Time ◽  
Isothermal Heat Treatment ◽  
Particle Volume ◽  
Semi Solid ◽  
Sic Particle

Effects of SiC particle and holding time on microstructure evolution of SiCP/AZ61 composites during semi-solid isothermal heat treatment method were studied, and evolution mechanism of semi-solid microstructure of composites was discussed. The results indicated that the process of microstructure evolution of SiCP/AZ61 composites by the isothermal holding at the temperatures of 595°C for different times (0min~90min) experienced in succession the rapid merging of the secondary dendritic arms →large massive structure→melting and separating of the local grain boundary →spheroidization of the gains →slowing growth of globular microstructure. Synthetically, after isothermal holding at 595°C for 30min to 60min the favorable semi-solid microstructure can be obtained; Compared with the monolithic AZ61alloy, microstructure of SiCP/AZ61 composites during semi-solid isothermal heat-treatment was finer as a result of entering of Sic particle, and with the increasing of SiC particle volume fraction, globular gain size was smaller.

scholarly journals Effects of Sm addition on microstructural evolution of Mg-6Zn-0.4Zr alloy during semi-solid isothermal heat treatment

China Foundry ◽  
2017 ◽  
Vol 14 (2) ◽  
pp. 85-92 ◽  
Author(s):  
Yu Zhang ◽  
Xiao-feng Huang ◽  
Ying Ma ◽  
Ti-jun Chen ◽  
Yuan Hao
Keyword(s):  
Heat Treatment ◽  
Microstructural Evolution ◽  
Isothermal Heat Treatment ◽  
Semi Solid

scholarly journals Effect of Microstructures and Mechanical Properties of Large Deformation High Entropy Alloy CoCrCuFeNi in Semi-solid Isothermal Heat Treatment

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Lajie WANG ◽  
Jiao XIONG ◽  
Jun LIU ◽  
X J YANG
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cold Rolling ◽  
Liquid Fraction ◽  
Grain Morphology ◽  
High Entropy Alloy ◽  
Isothermal Heat Treatment ◽  
Scanning Calorimetry ◽  
High Entropy ◽  
Semi Solid

The semi-solid slurries of the CoCrCuFeNi high entropy alloy (HEA) were fabricated through the recrystallization and partial melting (RAP) process by cold-rolling and partial remelting. The temperature range of the semi-solid region and the relationship between the liquid fraction and the temperature were determined by the differential scanning calorimetry (DSC) curve. The effect of isothermal temperature and holding time on the evolution of the microstructure and mechanical properties of the rolled samples was analyzed. The results show that the microstructure was significantly deformed, and the tensile strength has been increased by 107% after 63% rolling deformation of the CoCrCuFeNi high entropy alloy (HEA). The high-entropy alloy after cold rolling was maintained at 1150 and 1300 ° C for 20, 30, 60, and 120 minutes respectively, the plasticity has been improved compared with the rolled high entropy alloy. The optimal plasticity was reached 13.7% and 7.9% at 1150 ℃ and 1300℃ for 30 minutes, respectively. After semi-solid isothermal heat treatment, the grain morphology changed from dendritic of as-cast or rolled to spherulite and the grain size increased significantly with time and the holding temperature increased.

scholarly journals Effects of Semi-solid Isothermal Heat Treatment on Microstructures and Damping Capacities of Fly Ash Cenosphere/AZ91D Composites

2018 ◽  
Vol 31 (9) ◽  
pp. 953-962 ◽  
Author(s):  
En-Yang Liu ◽  
Si-Rong Yu ◽  
Ming Yuan ◽  
Fan-Guo Li ◽  
Yan Zhao ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Fly Ash ◽  
Isothermal Heat Treatment ◽  
Fly Ash Cenosphere ◽  
Semi Solid
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