文章信息/Info

Title:

Research Progress of CrCoNi-Based Multi-Component Alloys

文章編號:

1674-3962(2021)04-0241-10

作者:

潘云煒; 董安平; 杜大帆; 周陽; 何林; 李仲杰; 汪東紅; 疏達(dá); 祝國梁; 孫寶德

（上海交通大學(xué)材料科學(xué)與工程學(xué)院，上海 200240）

Author(s):

PAN Yunwei; DONG Anping; DU Dafan; ZHOU Yang; HE Lin; LI Zhongjie;  WANG Donghong; SHU Da; ZHU Guoliang; SUN Baode

(School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

關(guān)鍵詞:

多主元合金; CrCoNi; 合金元素; 增材制造; 力學(xué)性能; 變形孿晶

Keywords:

multi-component alloys;  CrCoNi;  alloying elements;  additive manufacturing;  mechanical properties;  deformation twins

分類號:

TG139

DOI:

10.7502/j.issn.1674-3962.202007038

文獻(xiàn)標(biāo)志碼:

A

摘要:

總結(jié)了近期引起國內(nèi)外眾多學(xué)者關(guān)注的CrCoNi基多主元合金的研究現(xiàn)狀。首先簡要地介紹了CrCoNi基合金的發(fā)展歷史，詳細(xì)分析了該合金的變形機(jī)理，其中包括變形孿晶的形成原因及其對合金性能產(chǎn)生的影響。其次介紹了包括冷軋、熱軋和增材制造在內(nèi)的多種加工工藝對該合金顯微組織及力學(xué)性能的影響。目前制備CrCoNi合金應(yīng)用最廣泛的方法是“鑄造-冷軋-熱處理”。但是有學(xué)者研究發(fā)現(xiàn)，通過增材制造制備的CrCoNi合金，其強(qiáng)度在不經(jīng)過任何打印后熱處理就與傳統(tǒng)冷軋+熱處理方式制備的合金相當(dāng)，說明CrCoNi合金是一種非常適合于增材制造加工的合金。隨后，分類討論了多種合金元素對CrCoNi基多主元合金顯微組織、相穩(wěn)定性和力學(xué)性能的影響。其中Al和Ti的復(fù)合添加使面心立方（FCC）基體上析出了γ′相，對CrCoNi合金的強(qiáng)化效果最為顯著，明顯改善了合金的力學(xué)性能。最后，提出了CrCoNi基多主元合金的后續(xù)研究方向及其潛在應(yīng)用背景。

Abstract:

This review comprehensively summarizes the recent researches of CrCoNi-based multi-component alloys which have attracted broad interest of researchers at home and abroad. The development history and research progress of CrCoNi-based alloys are briefly introduced. The deformation mechanism of the alloy is analyzed in detail, including the formation of the deformation twins and the effects on mechanical properties. Secondly, the effects of various processing techniques including cold rolling, hot rolling and additive manufacturing on the microstructures and mechanical properties of the CrCoNi-based alloy are presented. At present, the most widely used method of preparing CrCoNi alloy is “casting-cold rolling-heat treatment”. However, some researchers have discovered that the mechanical properties of the additive manufactured CrCoNi-based alloys without any post heat treatment are comparable to that of the alloys prepared by the traditional cold rolling and heat treatment, indicating that CrCoNi alloy is very suitable for additive manufacturing. Then the influences of various alloying elements on the microstructures, phase stability and mechanical properties of the CrCoNi-based multi-component alloy are also discussed. Among them, the addition of Al and Ti has the strongest strengthening effect on the CrCoNi alloy, which causes the precipitation of γ′ phase on the FCC matrix, improving the mechanical properties of the alloy. Finally, future research directions and potential applications of CrCoNi-based alloys are proposed.