Abstract
Ti-14 mass%Mo alloys aged for 1 × 106 s at 623 K were deformed by means of a tensile test at 300, 523, 623 and 723 K in Ar atmosphere or of rolling at room temperature in order to investigate the brittle fracture mechanism related to the ω phase. These deformed specimens were observed by optical and transmission electron microscopy. Both deformed structures consisted of many band-like products. In the products, very few ω particles could be found. Instead, zones having a structure different from ω, β and α phases existed. It was found that these zones possessed a body centered triclinic structure, which was newly named β″ on account of the structural similarity to the β phase. The β″ was transformed from ω by deformation. In the transformation process to β″, one ω variant changed into two types of β″; one was closely related to the β matrix, and the other had a {112}〈111〉 twin relation to the former. It is suggested that the band products act as a path of crack propagation prior to the brittle fracture in the aged Ti-Mo alloy.
| Original language | English |
|---|---|
| Pages (from-to) | 780-787 |
| Number of pages | 8 |
| Journal | Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals |
| Volume | 59 |
| Issue number | 8 |
| Publication status | Published - Aug 1995 |
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ASJC Scopus subject areas
- Metals and Alloys
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Deformation induced transformation of ω phase in aged Ti-14 mass%Mo alloy. / Takemoto, Yoshito; Hida, Moritaka; Sakakibara, Akira.
In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 59, No. 8, 08.1995, p. 780-787.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Deformation induced transformation of ω phase in aged Ti-14 mass%Mo alloy
AU - Takemoto, Yoshito
AU - Hida, Moritaka
AU - Sakakibara, Akira
PY - 1995/8
Y1 - 1995/8
N2 - Ti-14 mass%Mo alloys aged for 1 × 106 s at 623 K were deformed by means of a tensile test at 300, 523, 623 and 723 K in Ar atmosphere or of rolling at room temperature in order to investigate the brittle fracture mechanism related to the ω phase. These deformed specimens were observed by optical and transmission electron microscopy. Both deformed structures consisted of many band-like products. In the products, very few ω particles could be found. Instead, zones having a structure different from ω, β and α phases existed. It was found that these zones possessed a body centered triclinic structure, which was newly named β″ on account of the structural similarity to the β phase. The β″ was transformed from ω by deformation. In the transformation process to β″, one ω variant changed into two types of β″; one was closely related to the β matrix, and the other had a {112}〈111〉 twin relation to the former. It is suggested that the band products act as a path of crack propagation prior to the brittle fracture in the aged Ti-Mo alloy.
AB - Ti-14 mass%Mo alloys aged for 1 × 106 s at 623 K were deformed by means of a tensile test at 300, 523, 623 and 723 K in Ar atmosphere or of rolling at room temperature in order to investigate the brittle fracture mechanism related to the ω phase. These deformed specimens were observed by optical and transmission electron microscopy. Both deformed structures consisted of many band-like products. In the products, very few ω particles could be found. Instead, zones having a structure different from ω, β and α phases existed. It was found that these zones possessed a body centered triclinic structure, which was newly named β″ on account of the structural similarity to the β phase. The β″ was transformed from ω by deformation. In the transformation process to β″, one ω variant changed into two types of β″; one was closely related to the β matrix, and the other had a {112}〈111〉 twin relation to the former. It is suggested that the band products act as a path of crack propagation prior to the brittle fracture in the aged Ti-Mo alloy.
UR - http://www.scopus.com/inward/record.url?scp=0029349809&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029349809&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0029349809
VL - 59
SP - 780
EP - 787
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
SN - 0021-4876
IS - 8
ER -