Ti-6246中<i>α</i>相转变织构的形成机制

doi:10.11901/1005.3093.2016.606

材料研究学报

2017, Vol. 31

Issue (10): 796-800 DOI: 10.11901/1005.3093.2016.606

研究论文

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Ti-6246中α相转变织构的形成机制

赵子博¹(

), 王国强^1,², 杨晓龙³, 刘建荣¹, 李玉兰¹, 杨锐¹

1 中国科学院金属研究所沈阳 110016
2 中国科学技术大学材料科学与工程学院合肥 230026
3 宝钛集团有限公司宝鸡 721014

Mechanism of α Texture Formation of Ti-6246 Alloy Induced by β Forging Process

Zibo ZHAO¹(

), Guoqiang WANG^1,², Xiaolong YANG³, Jianrong LIU¹, Yulan LI¹, Rui YANG¹

1 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2 School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
3 Baoji Titanium Industry Co., Ltd., Baoji 721014, China

引用本文:

赵子博, 王国强, 杨晓龙, 刘建荣, 李玉兰, 杨锐. Ti-6246中α相转变织构的形成机制[J]. 材料研究学报, 2017, 31(10): 796-800.
Zibo ZHAO, Guoqiang WANG, Xiaolong YANG, Jianrong LIU, Yulan LI, Rui YANG. Mechanism of α Texture Formation of Ti-6246 Alloy Induced by β Forging Process[J]. Chinese Journal of Materials Research, 2017, 31(10): 796-800.

全文: PDF(1074 KB) HTML

摘要:

利用EBSD研究了β单相区锻造Ti-6246饼坯的显微组织和晶体取向。结果表明,β锻造的Ti-6246合金有网篮组织,原始β晶粒沿着金属的流动方向拉长。β相呈现<100>_β与饼坯压缩方向平行的强丝织构。次生α相的织构类型与β相符合Burgers取向关系。当相邻原始β晶粒具有相近<110>方向时,在该β/β晶界两侧析出的次生α相的晶体c轴将沿着这一共同的<110>方向,即发生变体选择,导致α相在{0001}极图上的最大织构密度明显高于β相在(110)极图上的最大织构密度。

关键词 ：金属材料, Ti6246, 织构, 变体选择

Abstract：

The microstructure and texture of β forged Ti-6246 biscuit were studied using optical microscope (OM) and electron backscattered diffraction (EBSD). It is found that a mesh-basket like microstructure with elongated β-phase grains along the metal flow direction was formed after forging the Ti-6246 biscuit in β-phase state. The β-phase presented a strong <100> fiber texture parallel to the deformation direction. The texture components of transformed α-phase are controlled by the parent β-phase, but the intensity of the transformed α-phase is influenced by variant selection. The variant selection, the α-phase colonies with a common c-axis often situated at the prior β-phase boundary when the neighboring β-phase grains share a common {110} plane, is one of the important reasons for the strengthened α-phase texture intensity.

Key words： metallic materials Ti6246 texture variant selection

收稿日期: 2016-10-24

ZTFLH:

TG146

作者简介:

作者简介赵子博,男,1986年生,博士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.606 或 https://www.cjmr.org/CN/Y2017/V31/I10/796

图1 Ti6246饼坯的显微组织

图2 Ti6246合金饼坯的菊池线衬度图以及α相和β相的取向图

图3 EBSD测得图2a标记区域内同一原始β晶粒内α相和β相的极图

图4 Ti6246饼坯β相和α相的极图

图5 Ti6246合金中的变体选择

图6 计算所得无变体选择时α相的织构

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