工程科学学报，第39卷，第7期：1070-1076,2017年7月 Chinese Journal of Engineering,Vol.39,No.7:1070-1076,July 2017 D0l:10.13374/j.issn2095-9389.2017.07.013:http://journals..ustb.edu.cn 高应变速率下钛一钢复合板界面组织特征及变形机制 江海涛四，吴波，张韵，徐慧慧，田世伟 北京科技大学工程技术研究院，北京100083 ☒通信作者，E-mail:nwpujht(@163.com 摘要在高应变速率下，钛一钢复合板不同材料以不同的变形机制协调变形，结合界面起到至关重要的作用.本文分析研 究了高应变速率下钛一钢复合板的界面组织特征和变形机制.结果表明：在钢侧，随着应变速率的提高，小角度(3°~10)晶 界含量增多，织构组分{112241)逐渐演变为织构{66(386)和{11)(110).在钛侧，随着应变速率的提高，出现了明显 的形变孪晶组织，三种形变孪晶如{112}(1100》拉伸孪晶、{1122〈1123〉压缩孪晶和{101》〈1011〉拉伸孪晶产生的难易 程度不一样，变形机制由常规的“李生变形为主”转变为“位错滑移与孪生变形共存”的复合变形模式.在结合界面处，随着应 变速率的提高，需要适应由两侧产生的不同变形抗力，才能够实现连续变形而不致使材料发生破坏，其主要的协调机制依靠 结合界面及附近晶粒的滑移实现变形. 关键词钛一钢复合板：高应变速率：微观组织：晶体取向：变形机制 分类号TG335.85 Interfacial microstructure and deformation mechanism of Ti-steel clad plate under high strain rate JIANG Hai-tao,WU Bo,ZHANG Yun,XU Hui-hui,TIAN Shi-ei Institute of Engineering Technology,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:nwpujht@163.com ABSTRACT Under high-strain-rate conditions,Ti and steel in Ti-steel clad plate deformed,with the deformation compatibility mechanism playing a key role at the bonding interface.The interfacial microstructure and deformation mechanism of Ti-steel clad plate under high strain were investigated in this paper.The results show that,for the steel side,with increasing strain rate,the number of small-angle (3-10)grain boundaries increases and texture component (112 (241)gradually evolves into textures (665 (386) and (111(110).For the Ti side,with increasing strain rate,deformation twins appear.Different deformation twins such as tensile twin (1121(1100),compression twin {1122 (1123),and tensile twin {1012 (1011)are produced.The deformation mecha- nism of the Ti side at high strain rate transforms from a conventional "twin deformation"mode to the compound deformation mode "co- existence of dislocation slip and twin deformation."With the increase of strain rate,the bonding interface would coordinate the differ- ent deformation resistances of both sides,to achieve a continuous deformation without any materials damage.The main coordination mechanism relies on the bonding interface and the slip of adjacent grains. KEY WORDS Ti-steel clad;high strain rate;microstructure:crystal orientation:deformation mechanism 钛一钢复合板是一种集耐腐蚀、高强度等优点于或者爆炸一轧制等方法复合在一起的，属于异种金属 一身的理想结构材料，在真空制盐、化工、海水淡化等的焊接.由于钛和钢的密度、热膨胀系数、剪切模量、 领域得到了广泛应用.该材料是由钛板和钢板用爆炸 热导率等物理性能和化学性能的差异，在动态的高应 收稿日期：201609一12工程科学学报，第 39 卷，第 7 期: 1070--1076，2017 年 7 月 Chinese Journal of Engineering，Vol． 39，No． 7: 1070--1076，July 2017 DOI: 10． 13374 /j． issn2095--9389． 2017． 07． 013; http: / /journals． ustb． edu． cn 高应变速率下钛--钢复合板界面组织特征及变形机制 江海涛，吴 波，张 韵，徐慧慧，田世伟 北京科技大学工程技术研究院，北京 100083 通信作者，E-mail: nwpujht@ 163． com 摘 要 在高应变速率下，钛--钢复合板不同材料以不同的变形机制协调变形，结合界面起到至关重要的作用． 本文分析研 究了高应变速率下钛--钢复合板的界面组织特征和变形机制． 结果表明: 在钢侧，随着应变速率的提高，小角度( 3° ～ 10°) 晶 界含量增多，织构组分{ 1 12} 〈2 41〉逐渐演变为织构{ 6 65} 〈38 6〉和{ 111} 〈1 10〉． 在钛侧，随着应变速率的提高，出现了明显 的形变孪晶组织，三种形变孪晶如{ 11 21} 〈1 100〉拉伸孪晶、{ 11 22} 〈11 23〉压缩孪晶和{ 10 12} 〈10 11〉拉伸孪晶产生的难易 程度不一样，变形机制由常规的“孪生变形为主”转变为“位错滑移与孪生变形共存”的复合变形模式． 在结合界面处，随着应 变速率的提高，需要适应由两侧产生的不同变形抗力，才能够实现连续变形而不致使材料发生破坏，其主要的协调机制依靠 结合界面及附近晶粒的滑移实现变形． 关键词 钛--钢复合板; 高应变速率; 微观组织; 晶体取向; 变形机制 分类号 TG335. 85 Interfacial microstructure and deformation mechanism of Ti--steel clad plate under high strain rate JIANG Hai-tao ，WU Bo，ZHANG Yun，XU Hui-hui，TIAN Shi-wei Institute of Engineering Technology，University of Science and Technology Beijing，Beijing 100083，China Corresponding author，E-mail: nwpujht@ 163． com ABSTＲACT Under high-strain-rate conditions，Ti and steel in Ti--steel clad plate deformed，with the deformation compatibility mechanism playing a key role at the bonding interface． The interfacial microstructure and deformation mechanism of Ti--steel clad plate under high strain were investigated in this paper． The results show that，for the steel side，with increasing strain rate，the number of small-angle ( 3°--10°) grain boundaries increases and texture component { 1 12} 〈2 41〉gradually evolves into textures { 6 65} 〈38 6〉 and { 111} 〈1 10〉． For the Ti side，with increasing strain rate，deformation twins appear． Different deformation twins such as tensile twin { 11 21} 〈1 100〉，compression twin { 11 22} 〈11 23〉，and tensile twin { 10 12} 〈10 11〉are produced． The deformation mecha￾nism of the Ti side at high strain rate transforms from a conventional“twin deformation”mode to the compound deformation mode“co￾existence of dislocation slip and twin deformation． ”With the increase of strain rate，the bonding interface would coordinate the differ￾ent deformation resistances of both sides，to achieve a continuous deformation without any materials damage． The main coordination mechanism relies on the bonding interface and the slip of adjacent grains． KEY WOＲDS Ti--steel clad; high strain rate; microstructure; crystal orientation; deformation mechanism 收稿日期: 2016--09--12 钛--钢复合板是一种集耐腐蚀、高强度等优点于 一身的理想结构材料，在真空制盐、化工、海水淡化等 领域得到了广泛应用． 该材料是由钛板和钢板用爆炸 或者爆炸--轧制等方法复合在一起的，属于异种金属 的焊接． 由于钛和钢的密度、热膨胀系数、剪切模量、 热导率等物理性能和化学性能的差异，在动态的高应