文章信息/Info

Title:

The Fracture Property in Micro/Nano Laminated Metal Composites

作者:

劉志穎; 郭強; 張荻

上海交通大學 金屬基復合材料國家重點實驗室

Author(s):

LIU Zhiying;  GUO Qiang;  ZHANG Di

State Key Laboratory of Metal Matrix Composites，Shanghai Jiao Tong University，Shanghai 200240，China

關鍵詞:

微納疊層金屬; 斷裂韌性; 制備技術; 顯微結構; 構型復合化

Keywords:

micro/nano laminated metal; fracture toughness; fabrication processes; microstructure; microstructural achitecture

DOI:

10.7502/j.issn.1674-3962.2018.02.09

文獻標志碼:

A

摘要:

疊層金屬復合材料作為材料構型復合化的典型代表，在利用材料組元本征性能的基礎上，能充分發揮復合材料中不同組元間的協同、耦合及多功能響應機制。微納尺度下的疊層金屬復合材料由于其多界面結構及特殊的尺寸效應，能充分調控材料內部裂紋的萌生與擴展機制,同時發揮微納尺度材料優異的本征力學性能,以此來協調材料的強度和韌性的矛盾。目前，疊層金屬復合材料在航天、石油、機械、電子等領域均得到了廣泛的應用。圍繞微納疊層金屬材料的斷裂性能研究，綜述了其制備工藝和應用現狀，總結了其斷裂過程中的微觀機制和影響因素。同時，探討了這類材料中特殊的構型化增韌途徑，指出可采用先進的微納米尺度的材料加工與測試技術，結合原位顯微結構表征的方法，系統地研究微納疊層金屬材料的斷裂機理，以指導對該材料的進一步優化設計與制備

Abstract:

Laminated metal composites are a typical representative of composites having microstructural architectures. These materials not only make full use of the intrinsic properties of the individual constituent phases, but also take advantage of the synergistic, coupling, reinforcing effects, and the multi�瞗unctional response mechanisms of the different phases. Metallic laminates with repeat layer thickness on the micro��/nano�瞫cale possess abundant interphase interfaces and are characterized by special size�瞕ependent mechanical behaviors, so that balanced strength and toughness can be achieved by taking advantage of the excellent mechanical properties of the micro��/nano�瞫cale constituents, and by tailoring the crack initiation and propagation mechanism. Therefore, metallic micro�� and nano�瞝aminates are widely used in aerospace, petroleum, machinery, and electronics industry. In this paper, the fracture properties of metallic micro��/nano�瞝aminates are reviewed, with particular focus on the microscopic mechanisms and influencing factors of fracture toughness. The fabrication processing and engineering application of these materials are also discussed, and critical microstructural parameters that affect their fracture toughness are identified. It is proposed that by using state�瞣f�瞐rt, micro��/nano�瞫cale characterization tools (such as in situ SEM/TEM and three�瞕imensional atomic probe) combined with site�瞫pecific microstructural analysis may provide important implications on the fracture mechanism of micro��/nano�瞝aminated metallic materials, leading to improved modeling and design of these materials.