Texture and mechanical properties of cold-rolled Ti-26Nb-4Zr alloy plates
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摘要: 采用X射線衍射和室溫拉伸方法研究了冷軋變形和固溶處理對Ti-26Nb-4Zr合金板材的織構和力學性能的影響.研究發現,50%冷軋時形成了{001}〈uvw〉織構,隨著冷變形量的增加,逐漸形成了{121}〈111〉和{001}〈110〉混合織構,〈110〉方向由與軋制方向垂直轉到與軋制方向平行.800℃固溶處理后,隨著變形量的增加,{111}〈110〉再結晶織構形成并逐漸增強,但〈110〉方向始終保持與軋制方向平行.由于加工硬化及晶粒細化的作用,導致隨著變形量增加,冷軋板材的強度逐漸提高,塑性降低.固溶處理后,由于發生再結晶,使得板材的塑性相比冷軋態明顯提高.Abstract: The effects of cold rolling and solution treatment on the texture and mechanical properties of Ti-26Nb-4Zr alloy plates were investigated by X-ray diffraction and tensile testing at room temperature. It is found that a {001}〈uvw> rolling texture appears after 50% cold rolling. With increasing cold rolling reduction, a {121}〈111> and {001} <110> mixed texture forms finally. The 〈110> direction turns from perpendicular to parallel to the rolling direction. After solution treatment at 800°, a {111} <110> recrystallization texture forms and its intensity increases with cold rolling reduction, while the (110) keeps parallel to the rolling direction. Due to work-hardening and refined crystal strengthening, the strength of the cold rolled plates increases while the plasticity decreases with the increase of cold rolling reduction. After solution treatment, the plasticity increases markedly because of the occurrence of recrystallization.
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Key words:
- titanium-niobium alloys /
- texture /
- mechanical properties /
- cold rolling /
- solution treatment
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