文章信息/Info

Title:

Progress in Molecular Dynamics Simulations of Martensitic Transformation

作者:

宗洪祥;  丁向東;  孫軍;  任曉兵

西安交通大學金屬材料強度國家重點實驗室

Author(s):

ZONG Hongxiang;  DING Xiangdong;  SUN Jun;  Ren Xiaobing

State Key Laboratory for Mechanical behavior of Materials Xi’an Jiaotong University

關鍵詞:

馬氏體相變; 尺寸效應; 計算機模擬; 形狀記憶合金; 結構材料

DOI:

10.7502/j.issn.1674-3962.2016.06.03

文獻標志碼:

A

摘要:

馬氏體相變作為一類重要的結構轉變而廣泛存在于形狀記憶合金、鋼鐵等智能以及工程材料中。從原子尺度去理解馬氏體相變的微觀響應機制對于開發和提高這類材料的性能至關重要。本文主要綜述了利用分子動力學的手段研究馬氏體相變的相關工作：首先本文介紹了形狀記憶合金中的馬氏體相變行為及其尺寸效應方面的研究進展；進而講述了結構金屬材料中的馬氏體相變行為，特別是極端壓縮變形條件下馬氏體相變與塑性變形的交互作用機制。最后簡述了目前相變模擬中存在的問題以及未來的展望。

Abstract:

Martensitic transformation (MT) is one of the most commonly encountered transformations, existing in many engineering materials, such as steel and shape memory alloys. Optimizing the performance of these transforming materials requires a fundamental understanding the physical processes of MT from the atom-level. In the absence of experimental information, numerical simulations are critical to the study of the transformation behaviors at their characteristic lattice length scales. This review summarized recent atomic simulation works on martensitic materials. The MT behaviors in shape memory alloys as well as their size effect are first discussed. Then, we analyze the phase transformation in structural metals, especially their interaction with plastic deformations under extreme compression. Finally, the existing problems and prospects of the related research are presented.