Ti60鈦合金大棒材的顯微組織及力學(xué)性能
發(fā)布人：上海艾荔艾金屬材料有限公司bt990.com.cn
更新時(shí)間：2016-01-04
研究2種不同工藝制備的Ti60高溫鈦合金d300 mm棒材的顯微組織及力學(xué)性能。
Ti60鈦合金大棒材的顯微組織及力學(xué)性能Microstructures and mechanical properties of?Ti60 Ti alloy large-section bars研究2種不同工藝制備的Ti60高溫鈦合金d300 mm棒材的顯微組織及力學(xué)性能。結(jié)果表明：Ti60合金大棒材的顯微組織靠近外表面的區(qū)域變形比較充分，顯微組織均勻性較好，靠近心部區(qū)域a相的等軸化程度低，顯微組織均勻性相對表面區(qū)域較差，這種差別會(huì)遺傳到兩相區(qū)的熱處理態(tài)顯微組織中；不同變形程度的大棒材顯微組織尤其是a相的形貌略有差異，但除600 ℃軸向拉伸性能外，室溫拉伸、蠕變性能差別很小，這主要是由于初生a相體積分?jǐn)?shù)較低的緣故。
The microstructures and mechanical properties of d300 mm large-section Ti60 high-temperature titanium bars prepared by two different forging processes were investigated. The results show that the near-surface region exhibits more sufficient deformation than the interior region. Accordingly, a more homogeneous microstructure is found at the near-surface region. While at the interior region, more strip-shaped a phases are found. This phenomenon will be passed down to the corresponding the heat-treated microstructure. Though large difference especially a phase morphology is found in the two different deformed Ti60 large-section bars, the difference of tensile and creep properties between them is not so apparent, except the tensile properties at 600 ℃. This can be attributed to the less a phase volume fraction.
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