王杰,熊清莲,熊宴邻,张富淇,杨锦.瞬间液相(TLP)扩散连接GH4169/TC4接头微观结构及力学性能研究[J].稀有金属材料与工程,2019,48(4):1275~1280.[Wang Jie,Xiong Qinglian,Xiong Yanlin,Zhang Fuqi,Yang Jin.The microstructure and mechanical properties of GH4169/TC4 joints prepared by transient liquid phase (TLP) diffusion bonding[J].Rare Metal Materials and Engineering,2019,48(4):1275~1280.]
瞬间液相(TLP)扩散连接GH4169/TC4接头微观结构及力学性能研究
投稿时间:2018-07-08  修订日期:2018-08-20
中文关键词:  TC4钛合金  GH4169高温合金  瞬间液相  扩散连接
基金项目:国家自然科学基金资助(项目号51602269)和西南石油大学“过学术关”项目资助(项目号201499010006)
中文摘要:
      为制备钛合金/镍基高温合金复合构件,拓展二者应用领域,本文以Ti/Ni复合箔片作为中间层,采用瞬间液相(TLP)扩散连接技术制备了TC4钛合金/GH4169高温合金接头,并对接头微观结构、力学性能和连接机理进行了研究和探讨。通过扫描电镜(SEM)、X射线衍射仪(XRD)、能谱分析仪(EDS)、万能实验机和显微硬度仪等对GH4169/TC4接头进行连接界面和断口形貌观察、成分表征、剪切性能和显微硬度测试,结果表明:在连接温度为960℃,保温时间30min,连接压力5MPa的工艺条件下,通过中间层与母材之间的元素扩散和化学反应,形成了“GH4169 / Ni(s,s)/ TiNi3 / Ti2Ni/ Ti / Ti2Ni / Ni / TiNi/ TC4”的多层梯度结构接头,除了“Ni / TiNi+Ti2Ni”界面处存在一定的孔洞和微裂纹,其余各连接界面连续致密,无明显缺陷。所制备GH4169/TC4接头各区域硬度起伏较大,其中,残余Ti层、Ni层区域硬度最低,有利于缓解接头内应力;GH4169侧界面区域硬度最高,主要是由于连接过程中形成的Ni(s,s)和TiNi3硬度较高。结合接头剪切性能测试、断口形貌和物相分析,所制备GH4169/TC4接头剪切强度达124.6MPa,开裂发生在TC4附近的“Ni / TiNi+Ti2Ni”界面区域,呈脆性断裂特征。
The microstructure and mechanical properties of GH4169/TC4 joints prepared by transient liquid phase (TLP) diffusion bonding
英文关键词:TC4 titanium alloy  GH4169 superalloy  transient liquid phase  diffusion bonding
英文摘要:
      To expand titanium alloy and Ni-based superalloy application fields, the prepration of titanium alloy/Ni-based superalloy composite joints is necessary. In this study, transient liquid phase (TLP) bonding has been successfully developed to join TC4 and GH4169 using Ti/Ni composite foils as interlayer. The microstructure, mechanical properties and formation mechanism of joint were investigated. The interfaces, fracture, composition and phases of as-prepared TC4/GH4169 joints were analyzed by scanning electronic microscopy (SEM), energy disperse spectroscopy (EDS) and X-ray diffraction(XRD), as well as shear strength and microhardness of joints were tested by universal testing machine and microhardness tester, respectively. The results showed that element interdiffusions and chemical reactions took place in the joining zone and multiple interlayer gradient structure, i.e. “Ni(s,s) / TiNi3/ Ti2Ni/ Ti/ Ti2Ni/ Ni/ TiNi”, was formed between GH4169 and TC4 under the process parameters of 960℃, 5MPa, 30min. The joint was compact with continuous interfacial bonding without obvious defects except some pores and microcracks exist in the interface of “Ni/ TiNi+Ti2Ni”. Hardness of each part of the prepared joint is not uniform, among them, the residual Ti and Ni interlayers have lower hardness, which is beneficial to alleviate the internal stress, the peak value appeared in the GH4169 side as a result of the formation of Ni(s,s) and TiNi3. Combined with the shear test, fracture morphology and phase analysis, the shear strength of as-prepared TC4/GH4169 joints achieved 124.6MPa and fracture occurs in the interface of “Ni/ TiNi+ Ti2Ni”, which presented a brittle characteristic.
作者单位E-mail
王杰 西南石油大学材料科学与工程学院 232198371@qq.com 
熊清莲 西南石油大学材料科学与工程学院 980214508@qq.com 
熊宴邻 西南石油大学材料科学与工程学院  
张富淇 西南石油大学材料科学与工程学院  
杨锦 成都天空燃控科技股份有限公司  
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