Determination of the yield strength and thickness of the surface modified layer of a material by uniaxial tension

1985 ◽  
Vol 21 (3) ◽  
pp. 265-268
Author(s):  
V. I. Savenko ◽  
E. D. Shchukin
Keyword(s):  
Yield Strength ◽  
Uniaxial Tension ◽  
Modified Layer ◽  
Surface Modified

scholarly journals Nanoindentation Properties of 18CrNiMo7-6 Steel after Carburizing and Quenching Determined by Continuous Stiffness Measurement Method

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 125 ◽  
Author(s):  
Guiyuan Zhou ◽  
Jian Guo ◽  
Junyu Zhao ◽  
Qian Tang ◽  
Zhaonan Hu
Keyword(s):  
Yield Strength ◽  
Indentation Depth ◽  
Contact Stiffness ◽  
Case Hardening ◽  
Modified Model ◽  
Cutoff Parameter ◽  
Modified Layer ◽  
Continuous Stiffness Measurement ◽  
Surface Modified ◽  
Insight Into

In this work, the nanomechanical properties involving the indentation size effect (ISE) and yield strength of a surface-modified layer of 18CrNiMo7-6 steel after case hardening were investigated via nanoindentation experiments. The experimental results showed that the hardness increased with an increase in strain rate; the contact stiffness versus indentation depth curves take the form of upper convexity due to residual compressive stress relaxation. On the basis of the Ruiz-Moreno model, a modified model considering the cutoff parameter as a function of indentation depth was proposed. This model was able to better describe the ISE of the surface-modified layer. With the Hough transform error angle of 0.1° as the critical value (h0.1° is the corresponding depth), when h > h0.1°, the yield strength calculated by the Ma model started to disperse at the depth of h0.1°. These results provide useful insight into the local mechanical properties of 18CrNiMo7-6 steel after carburizing and quenching treatment.

Corrosion Behaviours of Mo Modified Ti6Al4V Alloy in Hank’s Solution

2009 ◽  
Vol 610-613 ◽  
pp. 1150-1154
Author(s):  
Ai Lan Fan ◽  
Cheng Gang Zhi ◽  
Lin Hai Tian ◽  
Lin Qin ◽  
Bin Tang
Keyword(s):  
Electrochemical Corrosion ◽  
Optical Emission ◽  
Ti6al4v Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffusion Layers ◽  
Modified Layer ◽  
Surface Modified ◽  
Hank’S Solution ◽  
And Diffusion

The Mo surface modified layer on Ti6Al4V alloy was obtained by the plasma surface alloying technique. The structure and composition of the Mo modified Ti6Al4V alloy was investigated by X-ray diffraction (XRD) and glow discharge optical emission spectroscopy (GDOES). The Mo modified layer contains Mo coating on subsurface and diffusion layers between the subsurface and substrate. The X- ray diffraction analysis of the Mo modified Ti6Al4V alloy reveals that the outmost surface of the Mo modified Ti6Al4V alloy is composed of pure Mo. The electrochemical corrosion performance of the Mo modified Ti6Al4V alloy in 25°C Hank’s solution was investigated and compared with that of Ti6Al4V alloy. Results indicate that the self-corroding electric potential and the corrosion-rate of the Mo modified Ti6Al4V alloy are higher than that of Ti6Al4V alloy in 25°C Hank’s solution.

Square-wave voltammetric determination of thallium using surface modified thick-film graphite electrode with Bi nanopowder

2008 ◽  
Vol 10 (12) ◽  
pp. 1920-1923 ◽  
Author(s):  
Gyoung-Ja Lee ◽  
Hi Min Lee ◽  
Young Rang Uhm ◽  
Min Ku Lee ◽  
Chang-Kyu Rhee
Keyword(s):  
Thick Film ◽  
Graphite Electrode ◽  
Voltammetric Determination ◽  
Square Wave ◽  
Surface Modified
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