Weldability of Rare-Earth-Treated Homogeneous Armor Steel Plate

1957 ◽  
Author(s):  
G. Reed
Keyword(s):  
Rare Earth ◽  
Steel Plate ◽  
Armor Steel

scholarly journals Research on the Effect of Rare Earth on the Structure and Impact Performance of Armor Steel

2021 ◽  
Vol 1855 (1) ◽  
pp. 012005
Author(s):  
Mingyi Zhang ◽  
Ping Gao ◽  
Guoping Luo ◽  
Wenyuan Geng ◽  
Xiaobin Jia
Keyword(s):  
Rare Earth ◽  
Impact Performance ◽  
Armor Steel

The influence of rare earth elements lanthanum on corrosion resistance of steel plate for offshore platform

2021 ◽  
Author(s):  
Dong Ruifeng ◽  
Li Hua ◽  
Zhang Xiaoyu ◽  
Deng Xiangtao ◽  
Cui Qingling ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Steel Plate ◽  
Offshore Platform

Research on Preventing Copper-Brittleness Process for Hot Rolling Copper-Containing of Atmospheric Corrosion-Resisting Steel Used in Vehicles

2014 ◽  
Vol 1049-1050 ◽  
pp. 27-30
Author(s):  
Xin Cheng Li ◽  
Jie Liu ◽  
Wei Xing Zhu ◽  
Yong Chun Tang ◽  
Xiao Li Wang
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Grain Boundaries ◽  
Production Technology ◽  
Hot Rolling ◽  
Atmospheric Corrosion ◽  
Steel Plate ◽  
Plate Surface ◽  
Surface Cracking ◽  
Corrosion Reaction

Copper in hot rolling copper-containing steel plate can passivate the cathode-anode of corrosion reaction on plate surface and form a dense anti-rusting layer, so the rusting reaction is postponed and prevented, and the corrosion resistance is enhanced. However, copper enrichment around grain boundaries in copper-containing steel plate leads to the formation of net-like surface cracking called copper-brittleness. In this paper, through researching the technologies of smelting, and adding rare earth and heating, a reasonable and feasible production technology is found, which effectively prevents the defect of copper-brittleness.

scholarly journals Study on the Control of Rare Earth Metals and Their Behaviors in the Industrial Practical Production of Q420q Structural Bridge Steel Plate

Metals ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 240 ◽  
Author(s):  
Rensheng Chu ◽  
Yong Fan ◽  
Zhanjun Li ◽  
Jingang Liu ◽  
Na Yin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Steel Plate ◽  
Rare Earth Metals ◽  
Bridge Steel

The Formation of Adiabatic Shear Band and Analysis of its Characteristics in the Process of Penetration

2012 ◽  
Vol 472-475 ◽  
pp. 2846-2849
Author(s):  
Jin Quan Li ◽  
Sheng Xu Wang
Keyword(s):  
Plastic Deformation ◽  
Shear Band ◽  
Steel Plate ◽  
Adiabatic Shear Band ◽  
Shear Bands ◽  
Adiabatic Shear ◽  
Stress And Strain ◽  
Adiabatic Shear Bands ◽  
Micro Cracks ◽  
Armor Steel

The characteristics and causes of the formation of adiabatic shear bands (ASB) in 30CrMnMo armor steel plate are analyzed by shooting 93W projectiles. The results show that adiabatic shear bands do not occur in the initial stages of the opening-crater and plugging. Adiabatic shear bands distributed sparsely appear in the stable penetrating phase because of the necessary strain volume. Adiabatic shear bands are formed along main shear stress lines at an angle of about 450 in relation to the penetrating direction. These are approximately consistent with the direction of the plastic deformation slip line. The non-homogenous deformation and centralizing of stress and strain inside the adiabatic shear band causes micro-cracks and micro-bores during cooling of the plate.

Characterization of Rare-Earth Fluoride Anti-Stokes Phosphors by Scanning arid Transmission Electron Microscopy

1971 ◽  
Vol 29 ◽  
pp. 142-143
Author(s):  
N. M. P. Low ◽  
L. E. Brosselard
Keyword(s):  
Electron Microscopy ◽  
Rare Earth ◽  
Elevated Temperatures ◽  
Stoichiometric Composition ◽  
Rare Earth Ions ◽  
Crystalline Solid ◽  
Precipitation Process ◽  
Rare Earth Fluoride ◽  
Earth Fluoride ◽  
Rare Earth Fluorides

There has been considerable interest over the past several years in materials capable of converting infrared radiation to visible light by means of sequential excitation in two or more steps. Several rare-earth trifluorides (LaF3, YF3, GdF3, and LuF3) containing a small amount of other trivalent rare-earth ions (Yb3+ and Er3+, or Ho3+, or Tm3+) have been found to exhibit such phenomenon. The methods of preparation of these rare-earth fluorides in the crystalline solid form generally involve a co-precipitation process and a subsequent solid state reaction at elevated temperatures. This investigation was undertaken to examine the morphological features of both the precipitated and the thermally treated fluoride powders by both transmission and scanning electron microscopy.Rare-earth oxides of stoichiometric composition were dissolved in nitric acid and the mixed rare-earth fluoride was then coprecipitated out as fine granules by the addition of excess hydrofluoric acid. The precipitated rare-earth fluorides were washed with water, separated from the aqueous solution, and oven-dried.

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