2Ni→β+TiNi→γ,過渡層主要是由TiNi和Ti2Ni以及Ti-Cr和Ti-Fe等二元相組成的混合體；沿材料底部至頂部微觀組織發(fā)生了由魏氏α片層組織到細(xì)小樹枝晶的轉(zhuǎn)變；對沉積結(jié)構(gòu)進(jìn)行顯微硬度測試,發(fā)現(xiàn)具有較高Ti2Ni相面積分?jǐn)?shù)的過渡層最硬,本研究發(fā)現(xiàn)最大值為823HV。"/>

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激光增材制造Ti6Al4V-Inconel718功能梯度材料的成分變化和微觀結(jié)構(gòu)演變
作者:
作者單位:

1.南京工業(yè)大學(xué);2.南京中科煜宸激光技術(shù)有限公司

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中圖分類號:

TG146.2

基金項(xiàng)目:

國家自然科學(xué)基金資助(項(xiàng)目號51875274)


Compositional Changes and Microstructure Evolution of Ti6Al4V-Inconel718 Functionally Graded Materials by Laser Additive Manufacturing
Author:
Affiliation:

1.Nanjing Tech University;2.Nanjing Zhongke Raycgam Laser Technology CO.LTD

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    摘要:

    利用激光增材制造技術(shù)制備了Ti6Al4V/Inconel718功能梯度材料,研究了該梯度材料的成分及相組成、顯微組織和顯微硬度的變化。研究表明：沿組成梯度方向發(fā)生了一系列相變：α+β→α+β+Ti2Ni→β+TiNi→γ,過渡層主要是由TiNi和Ti2Ni以及Ti-Cr和Ti-Fe等二元相組成的混合體；沿材料底部至頂部微觀組織發(fā)生了由魏氏α片層組織到細(xì)小樹枝晶的轉(zhuǎn)變；對沉積結(jié)構(gòu)進(jìn)行顯微硬度測試,發(fā)現(xiàn)具有較高Ti2Ni相面積分?jǐn)?shù)的過渡層最硬,本研究發(fā)現(xiàn)最大值為823HV。

    Abstract:

    Ti6Al4V/Inconel718 functionally graded materials were prepared by laser additive manufacturing technology. The composition, phase composition, microstructure and microhardness of the gradient materials were studied. The research shows that a series of phase transitions occur along the composition gradient direction: α+β→α+β+Ti2Ni→β+TiNi→γ, and the transition layer is mainly composed of TiNi and Ti2Ni and binary phases such as Ti-Cr and Ti-Fe. The composition of the mixture; the microstructure from the bottom to the top of the material has undergone a transformation from Widmanst?tten α-laths to fine dendritic structure; the microhardness test of the deposited structure shows that the transition layer with the higher Ti2Ni phase area fraction is the hardest. This study found a maximum of 823 HV.

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黃金鑫,孫中剛,常輝,唱麗麗,邢飛.激光增材制造Ti6Al4V-Inconel718功能梯度材料的成分變化和微觀結(jié)構(gòu)演變[J].稀有金屬材料與工程,2020,49(8):2813~2819.[Huang Jinxin, Sun Zhonggang, Chang Hui, Chang Lili, Xing Fei. Compositional Changes and Microstructure Evolution of Ti6Al4V-Inconel718 Functionally Graded Materials by Laser Additive Manufacturing[J]. Rare Metal Materials and Engineering,2020,49(8):2813~2819.]
DOI：10.12442/j. issn.1002-185X.20190610

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  • 收稿日期:2019-07-19
  • 最后修改日期:2019-09-16
  • 錄用日期:2019-10-11
  • 在線發(fā)布日期: 2020-09-27
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