TA15 钛合金棒材缺陷分析

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TA15 钛合金棒材缺陷分析
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作者单位:西部金属材料股份有限公司
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中图分类号:TG146. 23
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Analysis on Defects in TA15 Titanium Alloy Bar

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摘要:

某TA15 钛合金棒料加工产品,在进行低倍检查时发现存在亮斑缺陷,对其亮斑区显微组织进行

观察,确定了其异常区域;再用扫描电镜进一步分析确定该棒材异常区为富钛贫铝的化学成分偏析;显微硬度

测试结果显示该棒材的偏析组织为非脆性偏析。实验结果表明,按照上述方法可以有效判定TA15 合金成分

偏析及其类型;对性能满足标准要求的非脆性偏析,按标准切除偏析后可交货。

Abstract:

Bright ghost defect were found on products which made of TA15 titanium alloy bar when macroscopic

test. The microstructure is observed, by which the abnormal area for TA15 is principally determined . The chemical

compositions of that area is charactered by SEM,and the microhardness is tested by microhardness tester. The results

show that the titanium content in the segregation is higher than that in the normal area, the aluminum content in the

segregation is lower than that in the normal area, and the Vickers hardness in the segregation area is lower than that in

the normal area, that is so called non鄄brittle segregation metallurgical defect . For the material of TA15 with segrega鄄

tion structure, when the properties is according with the standard, the bar can be delivered as long as cut鄄off the seg鄄

ment with segregation.

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何伟. TA15 钛合金棒材缺陷分析[J].宇航材料工艺,2015,45(2).

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在线发布日期: 2016-11-28
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