Hydrogen effect on the deformation evolution process in situ detected by nanoindentation continuous stiffness measurement

2017 ◽  
Vol 127 ◽  
pp. 35-40 ◽  
Author(s):  
Yuanjian Hong ◽  
Chengshuang Zhou ◽  
Yuanyuan Zheng ◽  
Lin Zhang ◽  
Jinyang Zheng ◽  
...  
Keyword(s):  
Evolution Process ◽  
Hydrogen Effect ◽  
Stiffness Measurement ◽  
Continuous Stiffness Measurement

Hydrogen Effect on the Deformation Behavior of Austenitic Stainless Steels Investigated by Nanoindentation

2017 ◽  
Author(s):  
Lin Zhang ◽  
Yuanjian Hong ◽  
Jinyang Zheng ◽  
Bai An ◽  
Chengshuang Zhou
Keyword(s):  
Plastic Deformation ◽  
Stainless Steels ◽  
Deformation Behavior ◽  
Austenitic Stainless Steels ◽  
Gaseous Hydrogen ◽  
Hydrogen Effect ◽  
Full Understanding ◽  
Stiffness Measurement ◽  
Initial Stage ◽  
Continuous Stiffness Measurement

A full understanding of hydrogen effect on deformation is important to reveal the mechanism of hydrogen embrittlement. The effects of thermal gaseous hydrogen charging on 304 and 310S austenitic stainless steels have been examined by using nanoindentation. It is first found by using nanoindentation continuous stiffness measurement that hydrogen decreases the elastic modulus and increases the hardness in the initial stage of plastic deformation, while the hydrogen effect becomes weaker and remains nearly constant with further plastic deformation. Hydrogen increases the creep displacement in 310S steel, which indicates that hydrogen facilitates ambient creep. α′ martensite restrains the nanoindentation creep and hydrogen has little effect on the creep induced by α′ martensite.

Investigation of the Mechanical Properties of Nanocrystalline Cemented Carbides by Nano-Indentation Technique

2013 ◽  
Vol 456 ◽  
pp. 545-548
Author(s):  
Xue Mei Liu ◽  
Xiao Yan Song ◽  
Hai Bin Wang ◽  
Yao Wang ◽  
Yang Gao ◽  
...  
Keyword(s):  
Measurement Method ◽  
Bulk Material ◽  
In Situ Reduction ◽  
Nano Indentation ◽  
Stiffness Measurement ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Continuous Stiffness Measurement ◽  
Sintering Method

The nanocrystalline WC-Co bulk material with a relative density of 98.5% was prepared by combing in-situ reduction and carbonization reactions and spark plasma sintering method. Using continuous stiffness measurement method in the nanoindentation technique, the high precision modulus and hardness of the material were measured.

scholarly journals Insight into hydrogen effect on a duplex medium-Mn steel revealed by in-situ nanoindentation test

2019 ◽  
Vol 44 (36) ◽  
pp. 20545-20551 ◽  
Author(s):  
X. Lu ◽  
Y. Ma ◽  
M. Zamanzade ◽  
Y. Deng ◽  
D. Wang ◽  
...  
Keyword(s):  
Nanoindentation Test ◽  
Hydrogen Effect ◽  
Medium Mn Steel ◽  
Mn Steel ◽  
Insight Into

scholarly journals Melanocyte pigmentation stiffens murine cardiac tricuspid valve leaflet

2009 ◽  
Vol 6 (40) ◽  
pp. 1097-1102 ◽  
Author(s):  
Kantesh Balani ◽  
Flavia C. Brito ◽  
Lidia Kos ◽  
Arvind Agarwal
Keyword(s):  
Mechanical Properties ◽  
Storage Modulus ◽  
Tricuspid Valve ◽  
Viscoelastic Properties ◽  
Mechanical Analysis ◽  
Current Work ◽  
Valve Leaflet ◽  
Stiffness Measurement ◽  
Proper Functioning

Pigmentation of murine cardiac tricuspid valve leaflet is associated with melanocyte concentration, which affects its stiffness. Owing to its biological and viscoelastic nature, estimation of the in situ stiffness measurement becomes a challenging task. Therefore, quasi-static and nanodynamic mechanical analysis of the leaflets of the mouse tricuspid valve is performed in the current work. The mechanical properties along the leaflet vary with the degree of pigmentation. Pigmented regions of the valve leaflet that contain melanocytes displayed higher storage modulus (7–10 GPa) than non-pigmented areas (2.5–4 GPa). These results suggest that the presence of melanocytes affects the viscoelastic properties of the mouse atrioventricular valves and are important for their proper functioning in the organism.

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