scholarly journals Enhanced Mechanical and Corrosion Performance by Forming Micro Shear Bands in Cold Forged Mg-Gd-Y-Zr Alloy

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3181
Author(s):  
Zhengjiang Yang ◽  
Chuming Liu ◽  
Yonghao Gao ◽  
Xueyi Guo ◽  
Yingchun Wan
Keyword(s):  
Corrosion Resistance ◽  
Room Temperature ◽  
Shear Bands ◽  
Tensile Yield Strength ◽  
Cold Forging ◽  
Corrosion Performance ◽  
Quantitative Investigation ◽  
Ultrafine Structure ◽  
Mechanical Properties And Corrosion ◽  
Zr Alloy

Forging at room temperature was applied on the per-extruded Mg-Gd-Y-Zr alloy to investigate the effect of cold forging on the microstructure, mechanical properties and corrosion resistance of the alloy. Abundant micro shear bands with misorientations of 2–15° were generated in the as forged alloys. Tremendous enhancement in tensile yield strength was achieved after forging. With a quantitative investigation, micro band boundaries were considered to provide a great contribution to the reinforcement. The ultrafine structure resulting from the formation of micro shear bands led to increased corrosion resistance of the alloy.

scholarly journals Effects of solution treatment and aging on the microstructure, mechanical properties, and corrosion resistance of a β type Ti–Ta–Hf–Zr alloy

RSC Advances ◽  
2017 ◽  
Vol 7 (20) ◽  
pp. 12309-12317 ◽  
Author(s):  
Jixing Lin ◽  
Sertan Ozan ◽  
Khurram Munir ◽  
Kun Wang ◽  
Xian Tong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Phase Transitions ◽  
Corrosion Behaviour ◽  
Solution Treatment ◽  
Mechanical Properties And Corrosion ◽  
Zr Alloy

A β type TTHZ alloy (Ti–40Ta–22Hf–11.7Zr) experienced various phase transitions during solution and aging treatments, and the different phases of the alloy significantly influenced its mechanical properties and corrosion behaviour.

Effect of RE Addition on Microstructure and Properties of As-Cast Mg-6Zn-Zr Alloy

2013 ◽  
Vol 711 ◽  
pp. 110-114
Author(s):  
Seung Jin Lee ◽  
Joon Sik Park ◽  
Jeong Min Kim ◽  
Ki Tae Kim
Keyword(s):  
Electrical Conductivity ◽  
Grain Size ◽  
Tensile Strength ◽  
Corrosion Resistance ◽  
Room Temperature ◽  
Filling Ability ◽  
High Microhardness ◽  
Cast Microstructure ◽  
Zr Alloy ◽  
Zr Alloys

Typical as-cast microstructure of the MgZnRE-Zr alloys consists primarily of Mg matrix, MgZn and MgRE phases. Although the electrical conductivity was a slightly reduced by Ce-rich RE addition, the conductivity was remained high. Microhardness at room temperature and tensile strength at 200°C were clearly enhanced by the addition. Fluidity as mold filling ability was observed to increase significantly with the RE addition partly due to reduced grain size and solidification range, however the corrosion resistance predicted from polarization curves was little decreased.

Effects of Microstructures on the Tensile Properties and Corrosion Resistance of High-Purity Magnesium

2016 ◽  
Vol 849 ◽  
pp. 114-120
Author(s):  
Xiao Hui Feng ◽  
Hong Min Jia ◽  
Yun Teng Liu ◽  
Yang De Li ◽  
Wei Rong Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Mass Loss ◽  
Tensile Properties ◽  
High Purity ◽  
Room Temperature ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Nacl Solution ◽  
Coarse Grains ◽  
Mechanical Properties And Corrosion

The microstructure, tensile properties at room temperature and corrosion rate in the 0.9% NaCl solution of the as-cast, as-extruded and as-drawn high-purity magnesium (99.99wt.% Mg) were experimentally investigated, respectively. Due to the coarse grains, both the tensile properties and corrosion resistance of the as-cast high-purity Mg were the lowest among the three states specimens, the yield strength (YS), ultimate tensile strength (UTS) and the elongation (EL) were 26.6MPa, 69.2MPa and 5.6%, respectively. The mass-loss rate of the as-cast high-purity Mg in the NaCl solution was 0.44g⋅m-2⋅h-1. For the as-extruded high-purity Mg, as the grains was remarkably refined, the YS, UTS and EL increased to be 108.3MPa, 152.7MPa and 27.0%, respectively, and the mass-loss rate become slower to be 0.25g⋅m-2⋅h-1. Attributed to the further refined grains, the YS, UTS and EL of the as-drawn high-purity Mg increased to 134.1MPa, 199.4MP and 15.3%, respectively, and the mass-loss rate reduced to be 0.12g⋅m-2⋅h-1. The experimental results in the present research indicated that the grain refinement can effectively improve both the mechanical properties and corrosion resistance of the high-purity Mg.

Effect of Trace RE on Corrosion Behavior of Ag-Cu-Ni Alloys

2011 ◽  
Vol 197-198 ◽  
pp. 507-513 ◽  
Author(s):  
Fu Xiang Huang ◽  
Ping Yin ◽  
Yong Hong Xu ◽  
Ying Zhang ◽  
You Li Yang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Room Temperature ◽  
Chemical Compositions ◽  
Corrosion Performance ◽  
Surface Layers ◽  
Protective Properties ◽  
Electrochemical Tests ◽  
Ni Alloys ◽  
Ni Alloy

The corrosion performance of Ag-Cu-Ni-RE alloys in Na2S has been studied in order to assess the influence of rare earth (lanthanum and cerium) on the Ag-Cu-Ni alloys. Optical microscopy has been used to characterize the microstructures of the samples prior to the electrochemical tests. SEM, EDS and XRD have been used to observe the corrosion morphologies and chemical compositions of the samples. The electrochemical tests has been carried out at room temperature in 0.5, 1and 2% (wt. %) Na2S. The results reveal that the Ag-Cu-Ni-RE alloys exhibit improved corrosion resistance, as well as fine and uniform microstructures. Moreover, surface layers forming on Ag-Cu-Ni-RE alloys exhibit improved protective properties compared to the film growing on the Ag-Cu-Ni alloy. Here, it is also found that when comparing to the dilute Na2S solution conditions, there would be a little decrease of the corrosion rate in 2wt. %Na2S solution. In addition, Ag-Cu-Ni-La-Ce alloy generally exhibits the best corrosion resistance.

scholarly journals Micro-Shear Bands and Their Enhancement on High Temperature Strength of Mg-Gd-Y-Zr Alloy

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3262
Author(s):  
Hongchao Xiao ◽  
Zhengjiang Yang ◽  
Jie Li ◽  
Yingchun Wan
Keyword(s):  
Mechanical Properties ◽  
Fracture Behavior ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Shear Bands ◽  
Aging Treatment ◽  
Deformation Mode ◽  
High Temperature Strength ◽  
Subsequent Aging ◽  
Zr Alloy

When Mg-Gd-Y-Zr alloy is cold forged, a large number of nano-micro shear bands are formed inside the grains. It is observed that micro-shear bands hinder the sliding of dislocations, resulting in an increase in tensile strength at elevated temperatures. The subsequent aging treatment further strengthens the alloy. Compared with unforged aged alloys, aged samples with pre-generated micro-shear bands exhibit higher strength at room temperature to 250 °C, but exhibit similar properties at higher temperatures. Microstructure characterization and fracture behavior analysis indicate that the transformation of deformation mode from dislocation sliding to grain boundary activity is mainly due to the change of mechanical properties with temperature. In addition, the alloy precipitates with the aid of dislocations during tension, and exhibits higher strength at 200 °C than that at room temperature.

ALCAN 2027 T3511

Alloy Digest ◽  
2009 ◽  
Vol 58 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cross Sections ◽  
Damage Tolerance ◽  
Heat Treating ◽  
2024 Alloy ◽  
Zr Alloy

Abstract Alcan 2027 is an Al-Cu-Mg-Mn-Zr alloy, developed to provide higher strength and damage tolerance than the incumbent 2024 alloy. Alcan 2027 T3511 possesses good damage tolerance. This datasheet covers Alcan 2027 T3511 in both thin and the heavier cross sections. This datasheet provides information on composition, physical properties, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming and heat treating. Filing Code: AL-424. Producer or source: Alcan Inc.

ALCAN 7040-T7651

Alloy Digest ◽  
2008 ◽  
Vol 57 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Aerospace Structures ◽  
Zr Alloy

Abstract Alcan 7040 is an Al-Mg-Zn-Cu-Zr alloy, developed to provide an improved strength-toughness balance versus incumbent 7010 and 7050 alloys. This datasheet covers Alcan 7040 alloy in T7651 temper. The alloy is used in aerospace structures. This datasheet provides information on composition, physical properties, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming and heat treating. Filing Code: AL-418. Producer or source: Alcan Inc.

ALUMINUM 713.0

Alloy Digest ◽  
1985 ◽  
Vol 34 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Room Temperature ◽  
High Strength ◽  
Heat Treating ◽  
Good Combination ◽  
Casting Alloy ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Permanent Mold Castings ◽  
Aluminum Base

Abstract ALUMINUM 713.0 is an aluminum-base casting alloy that ages at room temperature to provide high-strength sand and permanent-mold castings. It has a good combination of mechanical properties and its corrosion resistance is equivalent to that of the aluminum-silicon alloys. It is dimensionally stable. Among its many uses are housings, machinery parts, fittings, lever arms and brackets. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-263. Producer or source: Various aluminum companies.

MAGNESIUM ZK61A

Alloy Digest ◽  
1969 ◽  
Vol 18 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Room Temperature ◽  
Heat Treating ◽  
Strength Properties ◽  
Casting Alloy ◽  
Chemical Company ◽  
Casting Alloys ◽  
Magnesium Casting

Abstract Magnesium ZK61A is a heat treatable sand casting alloy offering higher strength properties for room-temperature applications than other magnesium casting alloys. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Mg-67. Producer or source: The Dow Chemical Company.

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