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Preparation method of EBSD sample for Ti6242 alloy bar two-phase texture determination

A bar and texture technology, which is applied in the field of preparation of EBSD samples for the determination of Ti6242 bar two-phase texture, can solve the problems of inability to effectively characterize the β-phase texture, improve comprehensiveness, improve forging quality, and reduce sampling The effect of frequency

Active Publication Date: 2020-07-28
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing an EBSD sample for measuring the two-phase texture of Ti6242 rods, so as to solve the problem that when the EBSD method is used to evaluate the texture level of Ti6242 rods, only the α phase can be detected and the β phase texture cannot be effectively characterized. technical problems

Method used

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Examples

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Effect test

Embodiment

[0029] Step 1. Cut 17 sample blanks with a size of Φ12mm×7mm from the titanium alloy bar to be tested, and the corresponding numbers are S 0 , S 1 , S 2 …S 16 ;

[0030] Step 2. For the sample blank S of N=0~15 obtained in step 1 N respectively at temperature T N =(750+N×10)°C heat treatment after heat preservation for 60min and then water cooling to obtain sample H N ;

[0031] Step 3. Use the high-magnification tissue inspection sample preparation method specified in GB / T 5168-2008 to test the sample H obtained in step 2. N Processed to obtain metallographic sample G N , take samples G respectively N 5 photos of the microstructure;

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Abstract

The invention belongs to the field of titanium alloy texture analysis, and relates to a preparation method of an EBSD sample for Ti6242 alloy bar two-phase texture determination, which comprises the following steps: 1, sampling; 2, heat treatment; 3, preparation of a metallographic specimen and shooting a tissue picture; 4, detection of the Mo content of the alloy and the phase [alpha]; 5, determination of the volume fraction of the phase [alpha]; 6, calculation of the Mo content of the phase [beta]; 7, determination of a heat treatment temperature and heat treatment; and 8, completion of sample preparation. By adopting the sample prepared by the method, accurate identification of phases [alpha] and [beta] in the Ti6242 alloy bar by the EBSD technology can be realized, the detection efficiency is greatly improved, the detection area is effectively enlarged, the detection cost is reduced, and the reliability and comprehensiveness of texture level detection of the Ti6242 alloy bar by theEBSD technology are improved.

Description

technical field [0001] The invention belongs to the field of titanium alloy texture analysis, and relates to a method for preparing an EBSD sample for measuring the two-phase texture of a Ti6242 rod. Background technique [0002] Due to its low density, high specific strength, good toughness, corrosion resistance, non-toxic, non-magnetic and other excellent comprehensive properties, titanium alloy has become a key material in the fields of aviation, aerospace, weapons, ships and medicine. The allotropic transformation between the hexagonal α phase and the cubic β phase makes the microstructure and crystallographic characteristics of titanium alloys present remarkable characteristics. Since the α-phase and β-phase follow the Burgers orientation relationship, the α-phase in titanium alloys is prone to micro-texture. The existence of α-microtexture causes the "coarsening" and "non-uniformity" of the alloy structure to a certain extent, thus reducing the service performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20008C22C14/00
CPCG01N23/2005C22C14/00
Inventor 周毅曹京霞隋楠谭启明张明达丁建山黄旭
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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