Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Characterization method of mechanical properties of elastic-plastic graded modification layer on metal surface

A metal surface, elastic-plastic technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of many mathematical simplifications, cumbersome derivation, and the inapplicability of elastic-plastic gradient modified layers

Inactive Publication Date: 2015-07-22
TAIYUAN UNIV OF TECH
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Analysis of instrumented indentation test data for functionally graded materials, Surface & Coatings Technology, 2003, 168(2): 136-141 and Mechanics of indentation of plastically graded materials-I: Analysis, Journal of the Mechanics and Physics of Solids, 2008, 56(1):157-171. It is mentioned to establish the general constitutive equation of the gradient modified layer, but the mathematical simplification is too much, and the derivation is cumbersome, it is not applicable to the elastic-plastic gradient modified layer, only applicable to elastic Materials with obvious gradient effect or plastic gradient effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Characterization method of mechanical properties of elastic-plastic graded modification layer on metal surface
  • Characterization method of mechanical properties of elastic-plastic graded modification layer on metal surface
  • Characterization method of mechanical properties of elastic-plastic graded modification layer on metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Now take the elastic-plastic gradient modified layer formed by infiltration on the surface of pure Ti as an example to implement the present invention, as Figure 1 to Figure 5 Can show:

[0031] (1) First, the Ti substrate (Ф18mm×5mm) is polished step by step with 320, 600, 800, 1000, 1500, 2000, 2500 and 3000 mesh SiC emery papers, followed by 0.5μm emery polishing spray Polish until the surface roughness Ra<0.1μm. After polishing, use pure water and acetone to clean ultrasonically in turn and then set aside;

[0032] (2) With the help of the plasma surface alloying method, an elastic-plastic gradient modified layer with high hardness, wear resistance and corrosion resistance is formed on the surface of pure Ti by Mo infiltration. The optimized process parameters are: electrode spacing, that is, the distance between the target and the sample surface, is set to 18mm, the working pressure is 40Pa, the source negative bias is -660~-900V, and the workpiece negative bias...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a characterization method of mechanical properties of an elastic-plastic graded modification layer on a metal surface and belongs to the field of characterization of properties of modification layers on metal surfaces. According to the method, a plasma surface alloying method is adopted for a polished metal base material, infiltration elements are selected reasonably, and the elastic-plastic graded modification layer is formed on the surface of the polished metal base material. Butt bonding, sample inlaying and polishing treatment are performed on cut and prepared sample cross sections. The modification layer is divided into multiple sub-layers according to the thickness of the modification layer and the indentation contact radius for a nano-indentation test. Inverse analysis calculation is performed on a load-displacement curve obtained through test of each sub-layer with ANSYS v10.0 finite element software, and the elastic-plastic property parameter of each sub-layer is obtained. Mechanical property parameters of all the sub-layers are numerically fitted, so that mechanical property parameters of all points in the thickness direction of the elastic-plastic graded modification layer on the metal surface are obtained quantitatively. The method is easy to operate, besides, the matrix effect is eliminated, and the result is accurate and reliable.

Description

technical field [0001] The invention relates to a method for characterizing the mechanical properties of a metal surface elastic-plastic gradient modified layer, and belongs to the field of mechanical property characterization of the metal surface modified layer. Background technique [0002] Metal surface modification can effectively improve various performances such as wear resistance, deformation, fatigue, and corrosion of metal surfaces. Therefore, metal surface modification has been widely used in various industries since ancient times. Compared with the homogeneous modified layer, the gradient modified layer has two advantages: one is that there is no obvious interface problem, which can effectively avoid the spalling failure caused by interface weakening; the other is that it has better deformation coordination ability and can withstand High static / dynamic contact load has important application value for soft metal materials such as titanium alloy. [0003] At prese...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
Inventor 马永柏中朝牛晓燕林乃明张翔宇唐宾
Owner TAIYUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com