【摘要】：利用XRD、SEM和TEM等手段分析了TC16鈦合金輥模拉絲變形過(guò)程中的相組成和顯微組織的變化情況,并對(duì)不同應(yīng)變的輥模拉絲變形絲材進(jìn)行了室溫拉伸性能與顯微硬度測(cè)試。結(jié)果表明,在輥模拉絲變形過(guò)程中,TC16鈦合金絲材主要由α相和β相組成,部分β相發(fā)生應(yīng)力誘發(fā)α''馬氏體相變;隨著輥模拉絲真應(yīng)變的增加,TC16鈦合金絲材的顯微組織明顯細(xì)化,當(dāng)真應(yīng)變達(dá)到2.14時(shí),橫截面和縱截面中的α相和β相纖維狀組織厚度均約為0.3 mm,兩相衍射斑點(diǎn)已經(jīng)近似環(huán)狀,表明兩相顯微組織也明顯細(xì)化;隨著輥模拉絲真應(yīng)變的增加,TC16鈦合金絲材的抗拉強(qiáng)度和顯微硬度大幅提高,當(dāng)真應(yīng)變達(dá)到2.14時(shí),TC16鈦合金絲材的顯微硬度由初始的266 HV提高到365 HV。
[Abstract]:By means of XRD,SEM and TEM, the changes of phase composition and microstructure of TC16 titanium alloy roller die during wire drawing process were analyzed, and the tensile properties and microhardness of different strain roll die drawing deformed wires were tested at room temperature. The results show that the TC16 titanium alloy wire is mainly composed of 偽 phase and 尾 phase during the process of roll die wire drawing, and some 尾 phase occurs stress induced 偽 'martensitic transformation. With the increase of true strain of roll die drawing wire, the microstructure of TC16 titanium alloy wire was refined obviously. When the true strain reached 2.14, the thickness of 偽 phase and 尾 phase in cross section and longitudinal section were about 0.3 mm,. The diffraction spots of two phases have been similar to the ring shape, indicating that the microstructure of the two phases is also obviously refined. The tensile strength and microhardness of TC16 titanium alloy wire increased greatly with the increase of true strain of roller die drawing wire. When the true strain reached 2.14, the microhardness of TC16 titanium alloy wire increased from 266 HV to 365 HV..
【作者單位】： 中國(guó)科學(xué)院金屬研究所;
【基金】：遼寧省博士科研啟動(dòng)基金項(xiàng)目No.20141143~~
【分類(lèi)號(hào)】：TG146.23;TG359

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