| 电子束熔丝成形Ti-6Al-3Nb-2Zr-Mo合金的组织与力学性能 |
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| 引用本文： | 张帅锋,蒋鹏,于冰冰,巩水利,杨光.电子束熔丝成形Ti-6Al-3Nb-2Zr-Mo合金的组织与力学性能[J].焊接学报,2019,40(10):121-126,155. |
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| 作者姓名： | 张帅锋 蒋鹏 于冰冰 巩水利 杨光 |
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| 作者单位： | 中国船舶重工集团公司第七二五研究所,洛阳 471039;北京航空制造工程研究所,北京 100024 |
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| 基金项目： | 国家重点研发计划项目（2017YFB1103100） |
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| 摘 要： | 试验采用电子束熔丝快速成形方法(EBRM)制备了Ti-6Al-3Nb-2Zr-Mo合金试样，研究了EBRM Ti6321合金化学成分、显微组织、力学性能及冲击韧性. 结果表明，该合金在熔丝成形中Al元素烧损1.0%左右，且合金内部没有元素偏析. EBRM Ti6321合金显微组织为沿沉积高度方向生长、晶贯穿多个沉积层的粗大柱状晶，柱状晶内部以α片层为主. EBRM Ti6321合金x向和z向的室温抗拉强度各项异性系数为2.6%，断裂方式均为韧性断裂. x向和z向冲击韧性均不低于80 J，各向异性系数为3.1%；冲击断口有大量的韧窝，为典型的韧性断裂.
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| 关 键 词： | 电子束熔丝快速成形 显微组织 化学成分 力学性能 各项异性 |
| 收稿时间： | 2018/9/16 0:00:00 |
Microstructures and mechanical properties of Ti-6Al-3Nb-2Zr-Mo alloy fabricated by electron beam rapid manufacturing |
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| ZHANG Shuaifeng,JIANG Peng,YU Bingbing,GONG Shuili and YANG Guang.Microstructures and mechanical properties of Ti-6Al-3Nb-2Zr-Mo alloy fabricated by electron beam rapid manufacturing[J].Transactions of The China Welding Institution,2019,40(10):121-126,155. |
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| Authors: | ZHANG Shuaifeng JIANG Peng YU Bingbing GONG Shuili and YANG Guang |
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| Affiliation: | 1.Luoyang Ship Material Research Institute, Luoyang 471039, China2.Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China |
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| Abstract: | The Chemical compositions, microstructure, mechanical properties, toughness of Ti6321 alloy made by electron beam rapid manufacturing (EBRM) were studied. The 1% of Al in the solder wire was burned during the manufacturing process, and no element segregation was found. The as-built microstructures exhibit large columnar grains, which grew epitaxially along the height direction of deposits through many deposition layers. The columnar grain is mainly composed of α lamellae. As a result, the anisotropic coefficient of tensile strength is 2. 6%. Dimple are observed on fractured tensile specimens in both X and Z directions. The impact toughness of X and Z direction is not less than 80J, and the anisotropic coefficient of toughness is 2.6%. The impact fracture is typical ductile fracture, which consists of a large number of dimples. |
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| Keywords: | electron beam rapid manufacturing microstructure chemical content mechanical property anisotropy |
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