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首页> 外文期刊>Journal of Materials Research >Investigations on the effect of heating temperature and cooling rate on evolution of microstructure in an α + β titanium alloy
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Investigations on the effect of heating temperature and cooling rate on evolution of microstructure in an α + β titanium alloy

机译：加热温度和冷却速率对α+β钛合金组织演变的影响的研究

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摘要

In the present work, the effect of cooling rate on the evolution of the microstructure and mechanical properties of an alpha + beta titanium alloy has been systematically investigated. Titanium alloy samples were heated to 1066 degrees C (above the beta transus), 930 degrees C (just below the beta transus), and 850 degrees C (well below the beta transus) followed by oil quenching, air cooling, and furnace cooling, respectively. Primary alpha (alpha(p)), lamellar alpha (alpha(L)), and martensite (alpha') were the dominant features of the microstructures for all the samples heated below the beta transus. Furnace-cooled samples showed variation in the size and shape of the alpha(p) and fraction of alpha(L) according to the heating temperature. At slower cooling rates, the thickness of the alpha(L) increased with the increase in temperature. Transmission electron microscopy and X-ray diffraction confirmed the presence of alpha' in all the quenched samples. The volume fraction and size of the alpha(p) decreased with the increase in temperature but was independent of the cooling rate. The microhardness was relatively unaffected by the cooling rate for heating just below the beta transus, i.e.,930 degrees C. The modulus of elasticity was found to be extremely sensitive to the microstructure.
机译：在目前的工作中，已经系统地研究了冷却速率对α+β钛合金微观组织和力学性能的影响。将钛合金样品加热到1066摄氏度（在β转变温度以上），930摄氏度（在β转变温度以下）和850摄氏度（远在β转变温度以下），然后进行油淬，空冷和炉冷，分别。初级α（α（p）），层状α（α（L））和马氏体（α'）是加热到β-transus以下的所有样品的微观结构的主要特征。炉冷却的样品根据加热温度显示出alpha（p）的大小和形状以及alpha（L）的分数变化。在较低的冷却速度下，α（L）的厚度随温度的升高而增加。透射电子显微镜和X射线衍射证实了所有淬灭样品中都存在α'。 α（p）的体积分数和大小随温度的升高而降低，但与冷却速率无关。在刚好低于β转变温度即930℃下加热的冷却速率相对不影响显微硬度。发现弹性模量对显微组织极为敏感。

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  • 来源
    《Journal of Materials Research》 |2018年第8期|946-957|共12页
  • 作者

    Gupta Aman; Khatirkar Rajesh Kisni; Kumar Amit; Parihar Manendra Singh;

  • 作者单位

    Visvesvaraya Natl Inst Technol, Dept Met & Mat Engn, Nagpur 440010, Maharashtra, India;

    Visvesvaraya Natl Inst Technol, Dept Met & Mat Engn, Nagpur 440010, Maharashtra, India;

    Visvesvaraya Natl Inst Technol, Dept Met & Mat Engn, Nagpur 440010, Maharashtra, India;

    Visvesvaraya Natl Inst Technol, Dept Met & Mat Engn, Nagpur 440010, Maharashtra, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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