用中子衍射法研究RHQ-Nb3Al丝中残余应变与基体结构的关系
Residual Strain Dependence on Matrix Structure in RHQ-Nb3Al Wires by Neutron Diffraction Measurement
摘要：
我们制备了三种不同基体结构的非Cu RHQ-Nb 3Al丝材样品：全Ta基体、Nb和Ta的复合基体与Ta内丝以及全Nb基体。在J-PARC“TAKUMI”中在室温下测量线样品的中子衍射图案。为了获得材料的残余应变，我们通过多峰分析估计了丝中的晶格常数a。测量每根线材的粉末样品，其中粉末被认为是无应变的。所有粉末样品的晶粒尺寸均小于0.02 mm。对于具有全Nb基体的线材样品，我们还通过单峰分析获得了晶格间距d。根据两种分析结果估算了Nb 3Al丝的残余应变，并进行了比较。结果表明，多峰分析法得到的残留菌株具有较好的准确性，标准偏差较小。三种试样中Nb 3Al丝的残余应变的多峰分析结果均为轴向拉伸残余应变，全Ta基体、复合基体和全Nb基体的残余应变分别为0.12%、0.12%和0.05%。复合材料和纯Nb基体试样中Nb 3Al纤维的残余应变存在差异，表明纤维间材料的类型对残余应变有很大影响。本文报道了三种非铜RHO-Nb_3Al线材残余应变的测量方法、分析方法和结果。
英文摘要：
We prepared three types of non-Cu RHQ-Nb3Al wire samples with different matrix structures: an all-Ta matrix,a composite matrix of Nb and Ta with a Ta inter filament, and an all-Nb matrix. Neutron diffraction patterns of the wire samples were measured at room temperature in J-PARC "TAKUMI". To obtain residual strains of materials, we estimated lattice constant a by multi-peak analysis in the wire. Powder sample of each wire was measured, where the powder was considered to be strain-free. The grain size of all the powder samples was below 0.02 mm. For wire sample with the all-Nb matrix, we also obtained lattice spacing d by a single-peak analysis. Residual strains of Nb3Al filament were estimated from the two analysis results and were compared. Result, residual strains obtained from the multi-peak analysis showed a good accuracy with small standard deviation. The multi-peak analysis results for the residual strains of Nb3Al filament in the three samples were all tensile residual strain in the axial direction, they are 0.12%, 0.12%, and 0.05% for the all-Ta matrix, the composite matrix, and the all-Nb matrix, respectively. Difference in the residual strain of Nb3Al filament between the composite and all-Nb matrix samples indicates that type of inter-filament materials show a great effect on the residual strain. In this paper, we report the method of measurement, method of analysis, and results for residual strain in the tree types of non-Cu RHO-Nb3Al wires.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
