钛合金<strong>/</strong>不锈钢复合板的放电等离子烧结技术制备及其性能

doi:10.11901/1005.3093.2022.293

材料研究学报

2023, Vol. 37

Issue (8): 581-589 DOI: 10.11901/1005.3093.2022.293

研究论文

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钛合金/不锈钢复合板的放电等离子烧结技术制备及其性能

刘瑞峰¹(

), 仙运昌², 赵瑞², 周印梅², 王文先³

^1.太原理工大学航空航天学院太原 030024
^2.山西阳煤化工机械(集团)有限公司煤化工压力容器山西省重点实验室太原 030032
^3.太原理工大学材料科学与工程学院太原 030024

Microstructure and Properties of Titanium Alloy/Stainless Steel Composite Plate Prepared by Spark Plasma Sintering

LIU Ruifeng¹(

), XIAN Yunchang², ZHAO Rui², ZHOU Yinmei², WANG Wenxian³

^1.Taiyuan University of Technology, College of Aeronautics and Astronautics, Taiyuan 030024, China
^2.Shanxi Yangmei Chemical Machinery (Group) Co. Ltd., Shanxi Key Laboratory of Coal Chemical Pressure Vessels, Taiyuan 030032, China
^3.Taiyuan University of Technology, College of Materials Science and Engineering, Taiyuan 030024, China

引用本文:

刘瑞峰, 仙运昌, 赵瑞, 周印梅, 王文先. 钛合金/不锈钢复合板的放电等离子烧结技术制备及其性能[J]. 材料研究学报, 2023, 37(8): 581-589.
Ruifeng LIU, Yunchang XIAN, Rui ZHAO, Yinmei ZHOU, Wenxian WANG. Microstructure and Properties of Titanium Alloy/Stainless Steel Composite Plate Prepared by Spark Plasma Sintering[J]. Chinese Journal of Materials Research, 2023, 37(8): 581-589.

全文: PDF(11299 KB) HTML

摘要:

用放电等离子烧结技术(SPS)制备钛合金/不锈钢复合板，模拟计算连接界面处的电流密度场、温度场和应力场并分析了复合材料的微观组织、界面微纳力学行为和拉伸性能。结果表明：在高能脉冲电流的作用下发生短时尖端放电使连接界面处的温度瞬间升高，连接界面相对平直并发生了明显的Ti、Fe、Cr原子扩散，在界面处生成了少量的TiFe、TiFe₂和FeCr等金属间化合物。结合界面处金属间化合物的硬度达到3.557 GPa，远高于两侧金属基体(钛合金2.943 GPa，不锈钢2.717 GPa)的硬度。钛合金/不锈钢复合板的拉伸强度可达385.7 MPa，分别为钛合金母材和不锈钢母材的72%和80%。在拉伸过程中，不锈钢板解理断裂后钛合金板承载直至发生典型的韧性断裂。

关键词 ：复合材料, 放电等离子烧结技术, 尖端放电, 连接界面, 断裂机制

Abstract：

Composite plates of titanium alloy/stainless steel were prepared by spark plasma sintering (SPS), and their microstructure, micro-nano mechanical behavior and tensile properties were investigated. Results show that the temperature of the interface of titanium alloy/stainless steel rises fast owing to the short time spark discharge under the action of high energy pulse current. The interface is relatively flat, while inter-diffusion of Ti, Fe and Cr atoms occurs obviously. A small number of intermetallic compounds TiFe, TiFe₂ and FeCr formed at the interface. The hardness of the zone with brittle intermetallic compounds reached 3.5578 GPa, which is much higher than that of metal matrix on both sides (Ti-2.943 GPa, Steel-2.717 GPa). The tensile strength of the titanium alloy/stainless steel composite is 387.5 MPa, which is 72% and 79% of the base material of titanium alloy and stainless steel respectively. During the tensile process, cleavage fracture first occurs on the stainless-steel side, while the titanium alloy side continues to bear the load until the typical ductile fracture occurs.

Key words： composite spark plasma sintering tip spark bonding interface fracture mechanism

收稿日期: 2022-05-25

ZTFLH:

TG146.2+1

基金资助:国家重点研发计划(2017YFB0602605);山西省科技重大专项(MC2016-01);山西省科技重大专项(MC2016-02);国家自然科学基金(52075360);山西省应用基础研究项目(20210302124653)

通讯作者: 刘瑞峰，liuruifeng@tyut.edu.cn，研究方向为先进材料连接及界面行为

Corresponding author: LIU Reifeng, Tel: 15735161357, E-mail: liuruifeng@tyut.edu.cn

作者简介: 刘瑞峰，男，1991年生，博士

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表1 443铁素体不锈钢的化学成分

表2 TC1钛合金的化学成分

图1 SPS连接示意图和工艺曲线

图2 电流密度分布云图

图3 温度分布云图

图4 残余应力分布云图

表3 443铁素体不锈钢的热物理参数

表4 TC1钛合金的热物理参数

图 5 用放电等离子烧结技术连接的钛合金和不锈钢结合界面的微观形貌和面扫描图

图6 钛合金/不锈钢连接界面的EDS分析

表5 EDS点扫描结果

表6 纳米压痕测试结果

图7 SPS连接钛合金和不锈钢结合界面的EBSD图

图8 钛合金/不锈钢连接界面的XRD谱和钛-铁二元相图

图9 钛合金/不锈钢连接界面的纳米压痕测试结果

图10 钛合金/不锈钢复合板的拉伸曲线

图11 钛合金/不锈钢复合板的拉伸断口形貌

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