TA1/X80复合板用TiNi/NiCrMo双过渡层熔焊对接接头组织及性能*

doi:10.11901/1005.3093.2015.557

材料研究学报

2016, Vol. 30

Issue (5): 372-378 DOI: 10.11901/1005.3093.2015.557

本期目录 | 过刊浏览

TA1/X80复合板用TiNi/NiCrMo双过渡层熔焊对接接头组织及性能*

吴伟刚¹(

), 张敏², 丁旭¹, 史倩茹², 井强²

1. 西安航空学院材料工程学院西安 710077
2. 西安理工大学材料科学与工程学院西安 710048

Microstructure and Mechanical Property of Fusion Weld Butt Joints of TA1/X80 Composite Plate with TiNi and NiCrMo Double-Transition Layers

WU Weigang^1,^**(

), ZHANG Min², DING Xu¹, SHI Qianru², JING Qiang²

1. College of Material and Engineering, Xi’an Aeronautical University, Xi’an 710077, China
2. College of Material Science and Engineering, Xi’an University of Technology, Xi’an 710048, China

引用本文:

吴伟刚, 张敏, 丁旭, 史倩茹, 井强. TA1/X80复合板用TiNi/NiCrMo双过渡层熔焊对接接头组织及性能*[J]. 材料研究学报, 2016, 30(5): 372-378.
Weigang WU, Min ZHANG, Xu DING, Qianru SHI, Qiang JING. Microstructure and Mechanical Property of Fusion Weld Butt Joints of TA1/X80 Composite Plate with TiNi and NiCrMo Double-Transition Layers[J]. Chinese Journal of Materials Research, 2016, 30(5): 372-378.

全文: PDF(6365 KB) HTML

摘要:

以TiNi和NiCrMo为双过渡层焊接材料, 对TA1/X80复合板进行了熔焊对接实验, 利用OM、SEM、EDS及XRD等检测实验对接头组织构成、微观形貌、成分、相组成及力学性能进行了研究。结果表明, TA1/TiNi焊缝以等轴晶组织穿插连接, 从TA1侧到TiNi侧, Ti元素在界面处急剧降低, Ni元素缓慢升高; TiNi/NiCrMo焊缝以树枝状组织相互延伸并交织在一起, 在界面处形成了宽约40 μm的过渡带; 从过渡带TiNi侧到NiCrMo侧, Ti元素急剧降低, Ni元素先降低后又升高, Cr、Mo元素逐渐升高; NiCrMo/X80焊缝以点状或针状组织相互渗透连接, 从NiCrMo侧到X80侧, Fe元素急剧升高, Ni、Cr急剧降低。TiNi焊缝与NiCrMo焊缝均生成了一定数量的脆性相, 并导致接头强度、塑韧性低于母材区。

关键词 ：金属材料, TA1/X80复合板, 组织性能, 熔焊对接, 接头, 元素分布

Abstract：

Fusion weld of TA1/X80 composite plate was carried out by taking foils of TiNi, and NiCrMo as the double transition layer weld material. Then the microstructure, morphology, chemical and phase composition and mechanical properties of the weld metal were characterized by means of metallography, SEM, EDS, XRD. Results revealed that the weld seam with TA1/TiNi weld metal exhibited a microstructure with equiaxed grains, and the Ti content drastically descended along a line from TA1 side to TiNi side while Ni content gradual increases. The weld seam with TiNi/NiCrMo exhibited a dendritic microstructure and there existed a 40 μm wide transitional zone, and the Ti content rapidly reduced along a line from TiNi side to NiCrMo side, while Ni content decreased first and then restored, but Cr and Mo increased gradually. The weld seam of NiCrMo/X80 showed a mixed grain- and acicular-like microstructure, and the Fe content increased sharply at the interface. while the Ni content and Cr content reduced dramatically along a line from the NiCrMo side to the X80 side. The strength and toughness of welded joint are lower than that of the base metal area due to that there existed a certain number of brittle phases in the weld seams with TiNi and NiCrMo.

Key words： metallic materials TA1/X80 composite plate microstructure and properties fusion weld butt joints butt joint distribution of element

收稿日期: 2015-09-30

ZTFLH:

TG113

基金资助:* 国家高技术研究发展计划项目2013AA031303, 国家自然科学基金51274162和西安航空学院校级科研基金2015KY1104资助

作者简介: 本文联系人: 吴伟刚

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https://www.cjmr.org/CN/10.11901/1005.3093.2015.557 或 https://www.cjmr.org/CN/Y2016/V30/I5/372

图1 坡口形式及冲击试样尺寸

图2 母材区及焊缝各层OM像

图3 接头母材区界面SEM形貌及EDS元素分布(Wm-重量百分比, Wa-原子百分比)

图4 焊缝不同区域SEM形貌、EDS元素分布及含量(Wm-重量百分比,Wa-原子百分比)

图5 焊缝过渡区的XRD谱

表1 焊接接头力学性能

图6 接头过渡区断口形貌

图7 焊接接头横截面硬度分布曲线

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