METHOD FOR TESTING PHASE TRANSFORMATION POINT OF ALUMINIUM ALLOY

WIPO Patent Application WO/2017/152397

A1

A method for testing a phase transformation point of aluminium alloy, comprising cutting an aluminium alloy material to obtain at least three samples to be tested; performing heat treatment on a first sample to be tested to obtain a first resistivity-temperature curve; respectively performing quenching treatment and annealing treatment on a second sample to be tested and a third sample to be tested to obtain the second sample to be tested at a quenched state and the third sample to be tested at a fully annealed state, and respectively heating the second sample to be tested at a quenched state and the third sample to be tested at a fully annealed state to obtain a second resistivity-temperature curve and a third resistivity-temperature curve; obtaining a relative resistivity-temperature curve; and determining a phase transformation starting temperature and a phase transformation termination temperature of the sample to be tested according to the relative resistivity-temperature curve. By means of this method, a phase transformation behaviour and a phase transformation temperature under a non-linear cooling condition can be tested. The range of a cooling rate which can be tested in the method is wide, and a phase transformation behaviour of a small volume fraction and precipitated phase information about a small size can be captured.

LI HONGYING (CN)
LIU JIAOJIAO (CN)

PCT/CN2016/075988

September 14, 2017

March 09, 2016

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UNIV CENTRAL SOUTH (CN)

G01N25/12

WO2003083462A1

2003-10-09

CN101776627A	2010-07-14
CN105044151A	2015-11-11
CN101929967A	2010-12-29
CN1651908A	2005-08-10
JPH09166561A	1997-06-24
US4166378A	1979-09-04

BEYOND ATTORNEYS AT LAW (CN)

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