鐵素體不銹鋼晶粒度的非線性超聲表征

鐵素體不銹鋼晶粒度的非線性超聲表征Nonlinear Ultrasonic Characterization of Grain Size of Ferritic Stainless Steel

利用非線性超聲檢測技術，測量了不同晶粒尺寸鐵素體不銹鋼的非線性參數(shù)，并與傳統(tǒng)線性超聲技術的評估結果進行了比較。結果表明，隨著鐵素體不銹鋼晶粒尺寸的增大，聲速變化并不明顯，相對變化量為1.89%，衰減系數(shù)的相對變化量也只有5.65%，而非線性參數(shù)隨晶粒尺寸的增加而持續(xù)減小，這是由于聲波在材料內(nèi)的傳播過程中，其非線性效應很大一部分產(chǎn)生在晶界等不連續(xù)處，隨著晶粒尺寸的增大，晶界面積減小，非線性效應減弱。

The nonlinear parameters of ferritic stainless steels with different grain sizes were measured by nonlinear ultrasonic testing technique, and the results were compared with that of the traditional ultrasonic technology. The results show that with the increase of the grain size of ferrite stainless steel, the variation of sound velocity is not obvious, its relative change is only 1.89% and the relative change of attenuation coefficient is 5.65%. The nonlinear parameters whereas decrease continuously with the increase of the grain size, which is due to a large part of the nonlinear effect being generated in the grain boundary when the acoustic waves propagate in the material. With the increase of grain size, the grain boundary area is reduced, so the nonlinear effect is weakened.

全文下載：https://pan.baidu.com/s/19lUf8a1TpYIIAZmH1ezx7Q?

作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應商，通項公司擁有完善的服務體系和專業(yè)的團隊。在同客戶交易的過程中，我們力求根據(jù)不同的應用需求將我們的產(chǎn)品做到精益求精。針對當前和未來的市場需求，通項公司致力于為客戶提供優(yōu)質(zhì)的金屬材料解決方案。

TXCO has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. TXCO develops the superior alloy material solutions for current and future challenges.

獲取更多我們供應的產(chǎn)品和服務信息，請致電086-021-6786 0205或發(fā)電子郵件service@sinoav.com聯(lián)系我們，您也可以通過微信，微博，領英，臉書，推特和谷歌+與我們互動。

For more information on the products and services that we supply, call us at 086-021-6786 0205 or email us at service@sinoav.com. You can also get in touch on social media, we are constantly active on Weixin, Weibo, LinkedIn, Facebook, Twitter and Google+.