Microstructure, mechanical properties, and texture evolution of Mg–Zn–Y–Zr alloy fabricated by hot extrusion–shearing process

2019 ◽  
Vol 55 (1) ◽  
pp. 375-388 ◽  
Author(s):  
Shuai Dai ◽  
Feng Wang ◽  
Zhi Wang ◽  
Zheng Liu ◽  
Pingli Mao
Keyword(s):  
Mechanical Properties ◽  
Texture Evolution ◽  
Hot Extrusion ◽  
Zr Alloy

Effect of Fe on microstructures and mechanical properties of an Al–Mg–Si–Cu–Cr–Zr alloy prepared by low frequency electromagnetic casting

2017 ◽  
Vol 32 (11) ◽  
pp. 2067-2078
Author(s):  
Yi Meng ◽  
Jian-zhong Cui ◽  
Zhi-hao Zhao
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Low Frequency ◽  
Hot Extrusion ◽  
Casting Process ◽  
Electromagnetic Casting ◽  
Fe Content ◽  
Microstructures And Mechanical Properties ◽  
Phase Q ◽  
Zr Alloy

The effects of different Fe contents (0.168, 0.356 and 0.601 wt%) on microstructures and mechanical properties of the Al–1.6Mg–1.2Si–1.1Cu–0.15Cr–0.15Zr (all in wt%) alloys prepared by low frequency electromagnetic casting process were investigated in the process of solidification, hot extrusion, solid solution and aging treatments. The results show that the increase of Fe content promotes the formation of feathery grains in the process of solidification and the precipitation of another important strengthening phase Q′ with small size. Additionally, it also results in no recrystallization even after solid solution at a high temperature of 550 °C, which is because of the increase number of elliptical shaped and fine DO22-Al3Zr dispersoids (∼70 nm long and ∼35 nm wide) and the spherical or elliptical shaped Fe-containing phases. When Fe content of the alloy increases to 0.356 wt%, both the ultimate tensile strength and yield strength of the alloy-T6 increase by more than 60 MPa and with little cost of ductility.

Microstructures and Mechanical Properties of a Novel Mg-Gd-Y-Zn-Zr Alloy

2013 ◽  
Vol 765 ◽  
pp. 521-524 ◽  
Author(s):  
Zhong Yang ◽  
Jian Ping Li ◽  
Yan Rong Wang ◽  
Bi Wei Xiong
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Uniform Distribution ◽  
Hot Extrusion ◽  
Microstructure Characteristics ◽  
Composition And Structure ◽  
Second Phases ◽  
Microstructures And Mechanical Properties ◽  
Zr Alloy

The microstructure characteristics and mechanical properties of as-cast and hot extruded Mg-5Gd-4Y-0.5Zn-0.5Zr (GWZ540) alloy were investigated. The results show that coarse the as-cast GWZ540 alloy consisted of α-Mg grain and two second phases, disc-like Mg5(Zn0.2Y0.2Gd0.6) and block-shaped Mg24(Y0.6Gd0.4)5. Hot extrusion resulted in a significant refinement of the α-Mg grains and a uniform distribution of the second phases, but with little effect on the composition and structure of the second phases. It is also shown that GWZ540 alloy exhibits higher UTS and TYS and elongation at both room and elevated temperature than those of WE54 alloy.

scholarly journals Hot Extrusion Effect on the Microstructure and Mechanical Properties of a Mg–Y–Nd–Zr Alloy

2018 ◽  
Vol 50 (1) ◽  
pp. 184-192 ◽  
Author(s):  
L. Y. Sheng ◽  
B. N. Du ◽  
B. J. Wang ◽  
D. K. Xu ◽  
C. Lai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Extrusion ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloy

Microstructure and mechanical properties of Mg-Zn-Ca-Zr alloy fabricated by hot extrusion-shearing process

2020 ◽  
Vol 795 ◽  
pp. 139937
Author(s):  
Boning Wang ◽  
Feng Wang ◽  
Zhi Wang ◽  
Le Zhou ◽  
Zheng Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Extrusion ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloy

Microstructure and Mechanical Properties of As-Cast and As-Extruded Mg-Gd-Er-Zn-Zr Alloy

2015 ◽  
Vol 1088 ◽  
pp. 221-226 ◽  
Author(s):  
Kai Wen ◽  
Wen Bo Du ◽  
Ke Liu ◽  
Zhao Hui Wang ◽  
Shu Bo Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Room Temperature ◽  
Cast Alloy ◽  
Extrusion Direction ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Microstructure And Mechanical Properties ◽  
Room Temperature Tensile Test ◽  
Zr Alloy

The Microstructure and mechanical properties of as-cast and as-extruded Mg-12Gd-2Er-1Zn-0.6Zr alloy are investigated in the present paper. The microstructure is analyzed by OM, SEM and TEM with SAED, and the mechanical properties are valued by the room temperature tensile test. The result shows that the coarse Mg5(Gd, Er, Zn) phase in the as-cast alloy was broken during hot extrusion process, and it was distributed at the grain boundary along the extrusion direction. The enhancement in mechanical properties of the extruded alloy is mainly ascribed to the refinement of these grains. The sizes of dynamical recrystallized grains are homogeneously, which was about 7 μm. Stacking fault existed in the as-cast alloy, which has a little effect on the dynamic recrystallization because of its tiny thicknesses.

Microstructure and 1000–1400 K mechanical properties of cryomilled NiAl–0.7Zr

1999 ◽  
Vol 14 (6) ◽  
pp. 2418-2429 ◽  
Author(s):  
J. D. Whittenberger ◽  
A. Garg ◽  
Mohan G. Hebsur
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Mechanical Testing ◽  
Thermodynamic Analysis ◽  
Base Alloy ◽  
Hot Extrusion ◽  
Intermediate Temperature ◽  
Precipitation Strengthening ◽  
Strengthening Mechanisms ◽  
Zr Alloy

An attempt has been made to improve the intermediate temperature strength of cryomilled NiAl by utilizing third element solid solution or precipitation strengthening mechanisms. To this end an NiAl–0.7 (at.%) Zr alloy was cryomilled, densified by hot extrusion, and tested between 1000 and 1400 K. Although over 3 wt% nitrogen was introduced via cryomilling, mechanical testing revealed that the cryomilled NiAl–0.7Zr was significantly weaker than the base alloy between 1000 and 1200 K. Chemical and microstructural analyses revealed that, in addition to ∼ 16 vol% AlN, all the Zr had been converted into ZrN. A thermodynamic analysis of cryomilling indicated that the formation of ZrN could have been anticipated since it is a more stable nitride than AlN. While Zr was an unsatisfactory addition in NiAl, thermodynamics also suggest several alloying elements that might lead to good intermediate temperature strength after cryomilling.

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